A headset

Abstract

The application mainly relates to an earphone, which comprises a core module, an ear hanging assembly and a rear hanging assembly. Two ends of the ear hanging assembly are connected with the core module and one end of the rear hanging assembly respectively. The ear hanging assembly comprises a containing bin. The rear hanging assembly comprises an elastic metal wire, a metal connector and an elastic covering body. The metal connector is fixed at two ends of the elastic metal wire and is connected with the containing bin. The elastic covering body covers the elastic metal wire and forms a bin covering part to improve the wearing comfort of the earphone. The bin covering part at least partially covers the containing bin and comprises a first covering part and a second covering part which are fixed with the containing bin respectively. The bonding strength between the second covering part and the containing bin is greater than that between the first covering part and the containing bin. The relative positions of the bin covering part and the containing bin are adjusted in the process of glue jointing between the bin covering part and the containing bin by using the difference in the bonding strength, so that the assembly error between the bin covering part and the containing bin is eliminated, and the appearance quality of the earphone is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic devices, in particular to an earphone. BACKGROUND

[0002] With the continuous popularity of electronic devices, electronic devices have become an indispensable social and entertainment tool in people's daily life, and people's requirements for electronic devices are also getting higher and higher. Taking earphones as an example, not only excellent wearing comfort is needed, but also sound quality with low-frequency diving and high-frequency penetration and good endurance are needed. SUMMARY

[0003] The earphone provided by the present application includes a core module, an ear hanging assembly and a rear hanging assembly. The two ends of the ear hanging assembly are connected to the core module and one end of the rear hanging assembly, respectively. The ear hanging assembly includes a storage compartment for accommodating a battery or a main control circuit board. The rear hanging assembly includes an elastic metal wire, a metal connector and an elastic covering body. The metal connector is sleeved and fixed at both ends of the elastic metal wire, and is further connected to the storage compartment. The elastic covering body covers the elastic metal wire and further forms a storage body covering part. The storage body covering part at least partially covers the storage compartment and includes a first covering part close to the metal connector and a second covering part away from the metal connector. The first covering part and the second covering part are fixedly bonded to the storage compartment, respectively. The bonding strength of the second covering part to the storage compartment is greater than the bonding strength of the first covering part to the storage compartment.

[0004] The earphone provided by the present application can increase the reliability of the earphone by connecting the rear hanging assembly and the ear hanging assembly through the metal connector. Further, the elastic covering body as the outer layer of the rear hanging assembly and the ear hanging assembly contacts the skin of the user, which can improve the wearing comfort of the earphone. By using the difference in bonding strength, the relative positions of the storage body covering part and the storage compartment can be adjusted during the gluing process to eliminate the assembly error therebetween, which can improve the appearance quality of the earphone. BRIEF DESCRIPTION OF DRAWINGS

[0005] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0006] Figure 1 is a structural schematic diagram of an embodiment of the earphone provided by the present application;

[0007] Figure 2 is a cross-sectional structural schematic diagram of an embodiment of the core module provided by the present application;

[0008] Figure 3 Figure 1 is a schematic diagram of frequency response curves of a driver before and after setting a diaphragm according to the present application;

[0009] Figure 4 Figure 2 is a schematic diagram of a cross-sectional structure of an embodiment of a core shell according to the present application;

[0010] Figure 5 Figure 3 is a schematic diagram of a cross-sectional structure of an embodiment of a transducing device according to the present application;

[0011] Figure 6 Figure 4 is a schematic diagram of a partial cross-sectional structure of various embodiments of a diaphragm according to the present application;

[0012] Figure 7 Figure 5 is a schematic diagram of a partial cross-sectional structure of a diaphragm according to the present application;

[0013] Figure 8 Figure 6 is a schematic diagram of a principle structure of various embodiments of a sound guide component according to the present application;

[0014] Figure 9 Figure 7 is a schematic diagram of a top view structure of an embodiment of a sound resistance net according to the present application;

[0015] Figure 10 Figure 8 is a schematic diagram of frequency response curves of air conduction sound at a sound guide component of an embodiment of an earphone according to the present application;

[0016] Figure 11 Figure 9 is a schematic diagram of frequency response curves of air conduction sound at a sound guide component of an embodiment of an earphone according to the present application;

[0017] Figure 12 Figure 10 is a schematic diagram of frequency response curves of air conduction sound at a pressure relief hole of an embodiment of an earphone according to the present application;

[0018] Figure 13 Figure 11 is a schematic diagram of sound pressure distribution of a rear cavity before and after setting a sound adjusting hole of a core module according to the present application;

[0019] Figure 14 Figure 12 is a schematic diagram of frequency response curves of air conduction sound at a sound guide component of an embodiment of an earphone according to the present application;

[0020] Figure 15 Figure 13 is a schematic diagram of frequency response curves of air conduction sound at a sound guide component of an embodiment of an earphone according to the present application;

[0021] Figure 16 Figure 14 is a schematic diagram of frequency response curves of sound leakage of a core module according to the present application;

[0022] Figure 17 Figure 15 is a schematic diagram of a principle structure of an embodiment of a core module according to the present application;

[0023] Figure 18 is an exploded structural schematic view of an embodiment of the movement module provided by the present application;

[0024] Figure 19 is an exploded structural schematic view of an embodiment of the movement module provided by the present application;

[0025] Figure 20 is a cross-sectional structural schematic view of an embodiment of the movement module provided by the present application;

[0026] Figure 21 is a cross-sectional structural schematic view of an embodiment of the movement module provided by the present application;

[0027] Figure 22 is an exploded structural schematic view of an embodiment of the ear-hanging assembly provided by the present application;

[0028] Figure 23 is a partial cross-sectional schematic view of the ear-hanging assembly; Figure 22

[0029] Figure 24 is a partial enlarged structural schematic view of region A; Figure 23

[0030] Figure 25 is an exploded structural schematic view of an embodiment of the rear-hanging assembly provided by the present application;

[0031] Figure 26 is a partial cross-sectional schematic view of the rear-hanging assembly; Figure 25

[0032] Figure 27 is a partial enlarged structural schematic view of region B; Figure 25

[0033] Figure 28 is a partial cross-sectional schematic view of the rear-hanging assembly; Figure 25

[0034] Figure 29 is a structural schematic view of an embodiment of the coil support provided by the present application. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustrating the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0036] ​​​​​Reference to an "embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in a combination of claims of the application. The skilled person explicitly and implicitly understands that the embodiments described in this application can be combined with other embodiments.

[0037] In combination Figure 1 , the earphone 100 can include two core modules 10, two ear hanging components 20 and a back hanging component 30. Wherein, two ends of the back hanging component 30 are respectively connected with one end of a corresponding ear hanging component 20, and the other end of each ear hanging component 20 away from the back hanging component 30 is respectively connected with a corresponding core module 10. Further, the back hanging component 30 can be arranged in a curved shape for being arranged on the back side of the user's head, and the ear hanging component 20 can also be arranged in a curved shape for being hung between the user's ear and head, thereby facilitating the wearing requirement of the earphone 100; and the core module 10 is used to convert electrical signals into mechanical vibration, so that the user can hear the sound through the earphone 100. In this way, when the earphone 100 is in a wearing state, the two core modules 10 are respectively located on the left and right sides of the user's head, and the two core modules 10 are also pressed against the user's head under the cooperation of the two ear hanging components 20 and the back hanging component 30, so that the user can hear the sound output by the earphone 100.

[0038] It should be noted that the earphone 100 can also have other wearing modes, for example, the ear hanging component 20 covers or covers the user's ear, and the back hanging component 30 crosses the user's head, which will not be listed one by one.

[0039] In combination Figure 1 , the earphone 100 can also include a main control circuit board 40 and a battery 50. Wherein, the main control circuit board 40 and the battery 50 can be arranged in the same accommodating cavity of the ear hanging component 20, or can be arranged in the respective accommodating cavities of the two ear hanging components 20. Further, the main control circuit board 40 and the battery 50 can be electrically connected with the two core modules 10 through corresponding wires, the former can be used to control the core module 10 to convert electrical signals into mechanical vibration, and the latter can be used to provide power for the earphone 100. Of course, the earphone 100 described in this application can also include microphones, sound pickups and the like sound receivers, and Bluetooth, NFC and the like communication elements, which can also be connected with the main control circuit board 40 and the battery 50 through corresponding wires to realize corresponding functions.

[0040] It should be noted that the core module 10 described in this application is provided with two, and the two core modules 10 can each convert electrical signals into core vibration, mainly for facilitating the earphone 100 to realize stereo sound effect. Therefore, in some other application scenarios where the requirement for stereo sound is not particularly high, such as hearing aid for hearing-impaired patients, live word prompt for hosts, etc., the earphone 100 can also be provided with only one core module 10.

[0041] Based on the foregoing description, the core module 10 is configured to convert the electrical signal into mechanical vibration in the powered state, so that the user can hear the sound through the earphone 100. Generally speaking, the aforementioned mechanical vibration can be based on the principle of bone conduction and directly act on the auditory nerve of the user mainly through the bones and tissues of the user as a medium, or can be based on the principle of air conduction and act on the tympanic membrane of the user mainly through air as a medium, and then act on the auditory nerve. For the sound heard by the user, the former can be referred to as "bone conduction sound", and the latter can be referred to as "air conduction sound". Based on this, the core module 10 can form bone conduction sound, air conduction sound, or both.

[0042] In combination with Figure 2 and Figure 1 , the core module 10 can include a core shell 11 and a transducer device 12. The core shell 11 is connected to one end of the ear hook assembly 20 and is configured to contact the skin of the user. Further, the core shell 11 also forms a receiving cavity (not labeled in the figure), and the transducer device 12 is arranged in the aforementioned receiving cavity and connected to the core shell 11. The transducer device 12 is configured to convert the electrical signal into mechanical vibration in the powered state, so that the skin contact area (for example, the front bottom plate 1161 shown in Figure 4 can produce bone conduction sound under the action of the transducer device 12. In this way, when the user wears the earphone 100, the transducer device 12 converts the electrical signal into core vibration to drive the aforementioned skin contact area to produce mechanical vibration, which then directly acts on the auditory nerve of the user through the bones and tissues of the user as a medium, thereby enabling the user to hear bone conduction sound through the core module 10.

[0043] Further, the core module 10 can also include a diaphragm 13 connected between the transducer device 12 and the core shell 11, and the diaphragm 13 is configured to divide the internal space of the core shell 11 (i.e., the aforementioned receiving cavity) into a front cavity 111 close to the aforementioned skin contact area and a rear cavity 112 away from the aforementioned skin contact area. In other words, when the user wears the earphone 100, the front cavity 111 can be closer to the user than the rear cavity 112. The core shell 11 is provided with a sound outlet hole 113 in communication with the rear cavity 112, and the diaphragm 13 can produce air conduction sound transmitted to the human ear through the sound outlet hole 113 during relative movement between the transducer device 12 and the core shell 11. In this way, the sound produced in the rear cavity 112 can be transmitted out through the sound outlet hole 113, and then act on the tympanic membrane of the user through air as a medium, thereby enabling the user to also hear air conduction sound through the core module 10.

[0044] It should be noted that in combination with Figure 2When the transducer 12 moves the skin contact area toward the user's face, it can be simply considered as bone conduction sound enhancement. Simultaneously, the portion of the mechanism housing 11 opposite the skin contact area moves toward the user's face, while the transducer 12 and its connected diaphragm 13 move away from the user's face due to the action and reaction forces. This compresses the air in the rear cavity 112, resulting in increased air pressure. Consequently, the sound transmitted through the sound outlet 113 is enhanced, which can be simply considered as air conduction sound enhancement. Correspondingly, when bone conduction sound weakens, air conduction sound also weakens. Therefore, the bone conduction sound and air conduction sound generated by the mechanism module 10 in this application have the characteristic of being in phase. Furthermore, since the front cavity 111 and rear cavity 112 are largely separated by structural components such as the diaphragm 13 and the transducer 12, the change pattern of air pressure in the front cavity 111 is exactly opposite to the change pattern of air pressure in the rear cavity 112. Based on this, the movement housing 11 can also be provided with a pressure relief hole 114 communicating with the front cavity 111. The pressure relief hole 114 allows the front cavity 111 to communicate with the external environment, that is, air can freely enter and exit the front cavity 111. In this way, the change in air pressure in the rear cavity 112 can be minimized by the front cavity 111, which can effectively improve the acoustic performance of the air-conducted sound generated by the movement module 10. Among them, the pressure relief hole 114 and the sound outlet hole 113 are staggered, that is, they are not adjacent to each other, so as to avoid the silencing phenomenon caused by their opposite phase.

[0045] As an example, the actual area of ​​the outlet end of the sound outlet 113 can be greater than or equal to 8 mm². 2 This allows users to hear more air-conducted sound. The actual area of ​​the inlet end of the sound outlet 113 can also be greater than or equal to the actual area of ​​its outlet end.

[0046] It should be noted that: due to the thickness of structural components such as the movement housing 11, the through holes such as the sound outlet 113 and pressure relief hole 114 opened on the movement housing 11 have a certain depth. Therefore, relative to the aforementioned accommodating cavity, the aforementioned through holes have an inlet end close to the aforementioned accommodating cavity and an outlet end far from the aforementioned accommodating cavity. Furthermore, the actual area of ​​the outlet end described in this application can be defined as the area of ​​the end face where the outlet end is located.

[0047] By the above manner, since the air conduction sound and the bone conduction sound generated by the core module 10 originate from the same vibration source (i.e., the transducing device 12), and the phases of the two are also the same, the sound heard by the user through the earphone 100 can be stronger, the earphone 100 can be more power-saving, and thus the endurance of the earphone 100 is prolonged. In addition, by reasonably designing the structure of the core module 10, the air conduction sound and the bone conduction sound can be mutually matched in the frequency band of the frequency response curve, so that the earphone 100 can have excellent acoustic performance in a specific frequency band. For example, the air conduction sound compensates for the low frequency band of the bone conduction sound, and for another example, the air conduction sound strengthens the mid-frequency band and the high-frequency band of the bone conduction sound.

[0048] It should be noted that in the present application, the frequency range corresponding to the low frequency band can be 20-150Hz, the frequency range corresponding to the mid-frequency band can be 150-5kHz, and the frequency range corresponding to the high frequency band can be 5k-20kHz. Among them, the frequency range corresponding to the low-mid frequency band can be 150-500Hz, and the frequency range corresponding to the high-mid frequency band can be 500-5kHz.

[0049] Based on the above detailed description, and in combination with Figure 3 The skin contact area can generate bone conduction sound under the action of the transducing device 12, and the aforementioned bone conduction sound has a corresponding frequency response curve. The frequency response curve can have at least one resonance peak. Further, the peak resonance frequency of the resonance peak can satisfy the relationship: |f1-f2| / f1≤50%. In addition, the difference between the peak resonance intensity corresponding to f1 and the peak resonance intensity corresponding to f2 can be less than or equal to 5db. Wherein f1 is the peak resonance frequency of the resonance peak when the diaphragm 13 is connected with the transducing device 12 and the core shell 11, and f2 is the peak resonance frequency of the resonance peak when the diaphragm 13 is disconnected with any one of the transducing device 12 and the core shell 11. In other words, |f1-f2| / f1 can be used to measure the influence of the diaphragm 13 on the transducing device 12 to drive the aforementioned skin contact area; wherein the smaller the ratio, the smaller the influence. In this way, on the basis of not affecting the original resonance system of the core module 10 as much as possible, the introduction of the diaphragm 13 enables the core module 10 to synchronously output bone conduction sound and air conduction sound with the same phase, thereby improving the acoustic performance of the core module 10 and making it more power-saving.

[0050] As an example, in combination with Figure 3The embodiment can mainly investigate the offset of the low frequency band or the low-middle frequency band in the frequency response curve, that is, f1≤500 Hz, so that the low frequency and the low-middle frequency of the bone conduction sound are not affected as much as possible. The aforementioned offset can be less than or equal to 50 Hz, that is, |f1-f2|≤50 Hz, so that the diaphragm 13 does not affect the skin contact area driven by the transducing device 12 as much as possible. Further, the aforementioned offset can be greater than or equal to 5 Hz, that is, |f1-f2|≥5 Hz, so that the diaphragm 13 has a certain structural strength and elasticity, reduces the fatigue deformation in the use process, and further prolongs the service life of the diaphragm 13.

[0051] It should be noted that the above description is combined with Figure 3 The embodiment can define that the aforementioned skin contact area has a first frequency response curve (for example, k1+k2 shown in the following formula) when the diaphragm 13 is connected with the transducing device 12 and the movement core shell 11, and the aforementioned skin contact area has a second frequency response curve (for example, k1 shown in the following formula) when the diaphragm 13 is disconnected with any one of the transducing device 12 and the movement core shell 11. Figure 3 Figure 3 Further, for the frequency response curve described in the present application, the horizontal axis can represent the frequency, and the unit is Hz; the vertical axis can represent the intensity, and the unit is dB.

[0052] The above description is combined with Figure 4 and Figure 2 The movement core shell 11 can include a rear shell 115 and a front shell 116 connected with the rear shell 115. The rear shell 115 and the front shell 116 are buckled and spliced together to form a containing cavity for accommodating the transducing device 12, the diaphragm 13 and other structural members. Further, the front shell 116 is used to contact the skin of the user to form the skin contact area of the movement core shell 11, that is, when the movement core shell 11 contacts the skin of the user, the front shell 116 is closer to the user than the rear shell 115. Based on this, the transducing device 12 can be connected with the front shell 116, so that the transducing device 12 drives the skin contact area of the movement core shell 11 to produce mechanical vibration. Further, the sound outlet hole 113 can be arranged on the rear shell 115, and the pressure relief hole 114 can be arranged on the front shell 116. The diaphragm 13 can be connected with the rear shell 115, or connected with the front shell 116, or connected at the splicing part between the rear shell 115 and the front shell 116.

[0053] As an example, the rear shell 115 can include an integrally connected rear bottom plate 1151 and a rear cylindrical side plate 1152, and one end of the rear cylindrical side plate 1152 away from the rear bottom plate 1151 is connected with the front shell 116. The sound outlet hole 113 can be arranged on the rear cylindrical side plate 1152.

[0054] ​Further, the inner side of the core housing 11 can be further provided with an annular support 1153, for example, the annular support 1153 is provided at the end of the rear cylindrical side plate 1152 away from the rear bottom plate 1151. Among them, in combination with Figure 4 , taking the rear bottom plate 1151 as a reference datum, the annular support 1153 can be slightly lower than the end surface of the rear cylindrical side plate 1152 away from the rear bottom plate 1151. In combination with Figure 2 , in the vibration direction of the transducing device 12, the sound hole 113 can be located between the annular support 1153 and the rear bottom plate 1151. Based on this, the cross-sectional area of the sound hole 113 can gradually decrease in the direction from the entrance end to the exit end of the sound hole 113 (that is, the direction of the sound hole 113 towards the sound passage 141 mentioned later). To make the annular support 1153 have sufficient thickness in the vibration direction of the transducing device 12, thereby increasing the structural strength of the annular support 1153. In this way, when the rear housing 115 is buckled with the front housing 116, the front housing 116 can press and fix the coil support 121 mentioned later on the annular support 1153. Further, the diaphragm 13 can be fixed on the annular support 1153, or pressed on the annular support 1153 by the coil support 121, thereby connecting with the core housing 11.

[0055] As an example, the front housing 116 can include an integrally connected front bottom plate 1161 and front cylindrical side plate 1162, and the end of the front cylindrical side plate 1162 away from the front bottom plate 1161 is connected with the rear housing 115. Among them, the area where the front bottom plate 1161 is located can be simply regarded as the skin contact area described in the present application. Accordingly, the pressure relief hole 114 can be provided on the front cylindrical side plate 1162.

[0056] In combination with Figure 5 and Figure 2 , the transducing device 12 can include a coil support 121, a magnetic circuit system 122, a coil 123 and a spring sheet 124. Among them, the coil support 121 and the spring sheet 124 are arranged in the front cavity 111. The central area of the spring sheet 124 can be connected with the magnetic circuit system 122, and the peripheral area of the spring sheet 124 can be connected with the core housing 11 through the coil support 121, so as to suspend the magnetic circuit system 122 in the core housing 11. Further, the coil 123 can be connected with the coil support 121 and extend into the magnetic gap of the magnetic circuit system 122.

[0057] As an example, the coil support 121 can include a ring-shaped main body portion 1211 and a first cylindrical support portion 1212, one end of the first cylindrical support portion 1212 being connected with the ring-shaped main body portion 1211. Wherein, the ring-shaped main body portion 1211 can be connected with the peripheral region of the spring sheet 124, and the two can be formed as an integral structure by means of a metal insert injection molding process. At this time, the ring-shaped main body portion 1211 can be connected with the front bottom plate 1161 by one or a combination of connection methods such as gluing, clamping, etc. Further, the coil 123 is connected with the other end of the first cylindrical support portion 1222 away from the ring-shaped main body portion 1211, so as to extend into the magnetic circuit system 122. At this time, a part of the diaphragm 13 can be connected with the magnetic circuit system 122, and another part can be connected with at least one of the rear shell 115 and the front shell 116.

[0058] Further, the coil support 121 can also include a second cylindrical support portion 1213 connected with the ring-shaped main body portion 1211, the second cylindrical support portion 1213 surrounding the first cylindrical support portion 1212 and extending laterally from the ring-shaped main body portion 1211 in the same direction as the first cylindrical support portion 1212. Wherein, the second cylindrical support portion 1213 and the ring-shaped main body portion 1211 can be connected with the front shell 116 together, so as to increase the connection strength between the coil support 121 and the movement shell 11. For example: the ring-shaped main body portion 1211 is connected with the front bottom plate 1161, and at the same time, the second cylindrical support portion 1213 is connected with the second ring-shaped side plate 1152. Correspondingly, the second cylindrical support portion 1213 can be provided with a relief hole 1214 communicating with the pressure relief hole 114, so as to avoid the second cylindrical support portion 1213 blocking the communication between the pressure relief hole 114 and the front cavity 111. At this time, a part of the diaphragm 13 can be connected with the magnetic circuit system 122, and another part can be connected with the other end of the second cylindrical support portion 1213 away from the ring-shaped main body portion 1211, and then connected with the movement shell 11. Based on this, after the movement module 10 is assembled, the other end of the second cylindrical support portion 1213 away from the ring-shaped main body portion 1211 can press the other part of the diaphragm 13 on the annular abutment 1153.

[0059] It should be noted that the first cylindrical support portion 1212 and / or the second cylindrical support portion 1213 can be a continuous complete structure in the circumferential direction of the coil support 121, so as to increase the structural strength of the coil support 121, or can be a local discontinuous structure, so as to avoid other structural members.

[0060] As an example, the magnetic circuit system 122 can include a magnetic yoke 1221 and a magnet 1222, which cooperate to form a magnetic field. The magnetic yoke 1221 can include a bottom plate 1223 and a cylindrical side plate 1224 connected as a whole. Further, the magnet 1222 is arranged in the cylindrical side plate 1224 and fixed on the bottom plate 1223. The side of the magnet 1222 away from the bottom plate 1223 can be connected to the middle region of the spring sheet 124 through a connecting piece 1225, and the coil 123 is arranged to extend into the magnetic gap between the magnet 1222 and the magnetic yoke 1221. At this time, a part of the diaphragm 13 can be connected to the magnetic yoke 1221.

[0061] It should be noted that the magnet 1222 can be a magnet group formed by a plurality of sub-magnets. In addition, the side of the magnet 1222 away from the bottom plate 1223 can also be provided with a magnetic plate (not labeled in the figure).

[0062] In combination with Figure 6 , Figure 5 and Figure 2 , the diaphragm 13 can include a diaphragm body 131, which can include a first connecting portion 132, a pleat portion 133 and a second connecting portion 134 connected as a whole. The first connecting portion 132 surrounds the transducer device 12 and is connected to the transducer device 12; the second connecting portion 134 surrounds the periphery of the first connecting portion 132 and is arranged in the vertical direction of the vibration direction of the transducer device 12 and spaced apart from the first connecting portion 132; the pleat portion 133 is located in the spacing region between the first connecting portion 132 and the second connecting portion 134, and connects the first connecting portion 132 and the second connecting portion 134.

[0063] As an example, the first connecting portion 132 can be arranged in a cylindrical shape and can be connected to the magnetic yoke 1221; the second connecting portion 134 can be arranged in an annular shape and can be connected to the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211, and further connected to the movement core housing 11. In combination with Figure 5 , the connecting point between the pleat portion 133 and the first connecting portion 132 can be lower than the end face of the cylindrical side plate 1224 away from the bottom plate 1223.

[0064] Further, the pleat portion 133 forms a recessed area 135 between the first connecting portion 132 and the second connecting portion 134, so that the first connecting portion 132 and the second connecting portion 134 can more easily move relative to each other in the vibration direction of the transducer device 12, thereby reducing the influence of the diaphragm 13 on the transducer device 12. In combination with Figure 2 , the recessed area 135 can be recessed towards the back cavity 112. Of course, the recessed area 135 can also be recessed towards the front cavity 111, that is, the recessed direction of the recessed area 135 is opposite to that shown in Figure 2 .

[0065] It should be noted that the number of recessed regions 135 can be two or three, for example, and are spaced apart in a direction perpendicular to the vibration direction of the transducing device 12; the depths of each recessed region 135 in the vibration direction of the transducing device 12 can also not be the same. In this embodiment, the number of recessed regions 135 is one, which is exemplary.

[0066] As an example, the material of the diaphragm body 131 can be any one or a combination of polycarbonate (PC), polyamides (PA), acrylonitrile butadiene styrene (ABS), polystyrene (PS), high impact polystyrene (HIPS), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyurethanes (PU), polyethylene (PE), phenol formaldehyde (PF), urea-formaldehyde (UF), melamine-formaldehyde (MF), polyarylate (PAR), polyetherimide (PEI), polyimide (PI), polyethylene naphthalate two formic acid glycol ester (PEN), polyether ether ketone (PEEK), silica gel, or the like. Among them, PET is a thermoplastic polyester, which is good in molding, and the diaphragm made of PET is often called Mylar film; PC has strong impact resistance and is stable in size after molding; PAR is an advanced version of PC, mainly for environmental protection; PEI is softer than PET and has higher internal damping; PI is resistant to high temperature, has a higher molding temperature, and has a long processing time; PEN has high strength and is relatively hard, and is characterized by being paintable, dyeable, and platable; PU is often used as a damping layer or a folding ring in a composite material, has high elasticity and high internal damping; PEEK is a newer material, which is resistant to friction and fatigue. It is worth noting that a composite material can generally have the properties of multiple materials, such as a double-layer structure (generally hot-pressed PU, which increases internal resistance), a three-layer structure (sandwich structure, with a damping layer of PU, acrylic glue, UV glue, or pressure-sensitive glue in the middle), and a five-layer structure (two layers of film are bonded by double-sided adhesive, which has a base layer, usually PET).

[0067] Further, the diaphragm 13 can further include a reinforcing ring 136, which can have a rigidity greater than that of the diaphragm body 131. The reinforcing ring 136 can be annularly arranged, and can have an annular width greater than or equal to 0.4 mm and a thickness less than or equal to 0.4 mm. Further, the reinforcing ring 136 is connected to the second connecting portion 134, so that the second connecting portion 134 is connected to the core shell 11 through the reinforcing ring 136. In this way, the structural strength of the edge of the diaphragm 13 is increased, and the connection strength between the diaphragm 13 and the core shell 11 is increased.

[0068] It should be noted that the reinforcing ring 136 is annularly arranged, mainly to facilitate the annular structure of the second connecting portion 134; but the reinforcing ring 136 can be a continuous complete ring in structure, or a discontinuous segmented ring. Further, after the core module 10 is assembled, the other end of the second cylindrical support portion 1213 away from the annular body portion 1211 can press the reinforcing ring 136 on the annular abutment 1153.

[0069] As an example, the first connecting portion 132 can be injection molded on the outer circumferential surface of the magnetic shield 1221, and the reinforcing ring 136 can also be injection molded on the second connecting portion 134, to simplify the connection mode between the two and increase the connection strength between the two. The first connecting portion 132 can cover the cylindrical side plate 1224, and can further cover the bottom plate 1223, to increase the contact area between the first connecting portion 132 and the magnetic circuit system 122, and to increase the bonding strength between the two. Similarly, the second connecting portion 134 can be connected to the inner annular surface and one end surface of the reinforcing ring 136, to increase the contact area between the second connecting portion 134 and the reinforcing ring 136, and to increase the bonding strength between the two.

[0070] In combination Figure 6 , Figure 6 The embodiments (a) to (d) mainly illustrate various structural modifications of the diaphragm body 131, and the main difference between them is the specific structure of the folded portion 133. Among them, for the embodiment (a), the folded portion 133 can be arranged in a symmetrical structure, and the connection points formed by the two ends of the folded portion 133 and the first connecting portion 132 and the second connecting portion 134 can be coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 coincide. For the embodiment (b), the folded portion 133 can also be mostly arranged in a symmetrical structure, but the connection points formed by the two ends of the folded portion 133 and the first connecting portion 132 and the second connecting portion 134 are not coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 are staggered with each other. For the embodiment (c), the folded portion 133 can be arranged in an asymmetrical structure, and the connection points formed by the two ends of the folded portion 133 and the first connecting portion 132 and the second connecting portion 134 can be coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 coincide. For the embodiment (d), the folded portion 133 can also be mostly arranged in an asymmetrical structure, but the connection points formed by the two ends of the folded portion 133 and the first connecting portion 132 and the second connecting portion 134 are not coplanar, for example, the projections of the two connection points in the vibration direction of the transducer device 12 are staggered with each other. Figure 6 Figure 6 Figure 6 ​​In (c), the corrugated portion 133 can be provided in an asymmetric structure, but the two ends thereof are coplanar with the connection points formed by the first connecting portion 132 and the second connecting portion 134, respectively. Figure 6 In (d), the corrugated portion 133 can be provided in an asymmetric structure, and the two ends thereof are not coplanar with the connection points formed by the first connecting portion 132 and the second connecting portion 134, respectively.

[0071] Based on the above description, for the diaphragm 13, the diaphragm body 131 is softer, the more easily it is elastically deformed, and the less the influence on the transducer device 12, under the premise that the diaphragm body 131 has a certain structural strength to ensure its basic structure, fatigue resistance and other performances. Therefore, the thickness of the diaphragm body 131 can be less than or equal to 0.2 mm; preferably, the thickness of the diaphragm body 131 can be less than or equal to 0.1 mm. Among them, the elastic deformation of the diaphragm body 131 can mainly occur in the corrugated portion 133. Therefore, the thickness of the corrugated portion 133 can be smaller than the thickness of other parts of the diaphragm body 131. Therefore, the thickness of the corrugated portion 133 can be less than or equal to 0.2 mm; preferably, the thickness of the corrugated portion 133 can be less than or equal to 0.1 mm. Among them, the diaphragm body 131 is an example of an equal-thickness structure.

[0072] In combination with Figure 7 In the vibration direction of the transducer device 12, the recessed area 135 can have a depth H; in the vertical direction of the vibration direction of the transducer device 12, the recessed area 135 can have a half-depth width W1, and the first connecting portion 132 and the second connecting portion 134 can have a spacing distance W2. Among them, 0.2≤W1 / W2≤0.6, which can not only ensure the size of the deformable area on the corrugated portion 133, but also avoid structural interference between the corrugated portion 133 and the first connecting portion 132 and / or the movement core shell 11. Similarly, 0.2≤H / W2≤1.4, which can not only ensure the size of the deformable area on the corrugated portion 133, but also avoid structural interference between the corrugated portion 133 and the first connecting portion 132 and / or the movement core shell 11, and avoid the corrugated portion 133 being difficult to vibrate due to excessive self-weight.

[0073] It should be noted that the half-depth width W1 refers to the width of the recessed area 135 at a depth of 1 / 2H.

[0074] Further, the fold 133 can include integrally connected first, second, third, fourth and fifth transition sections 1331, 1332, 1333, 1334 and 1335. The first and second transition sections 1331 and 1332 can have one end connected to the first and second connecting sections 132 and 134 respectively and extend towards each other. The third and fourth transition sections 1333 and 1334 can have one end connected to the other end of the first and second transition sections 1331 and 1332 respectively. The fifth transition section 1335 can have two ends connected to the other end of the third and fourth transition sections 1333 and 1334 respectively. At this time, the aforementioned transition sections collectively enclose the recessed area 135. In the direction from the connecting point (e.g. point 7A) between the first transition section 1331 and the first connecting section 132 to the reference position point (e.g. point 7C) farthest from the first connecting section 132 of the fold 133, the included angle between the tangent (e.g. dotted line TL1) of the first transition section 1331 towards the recessed area 135 and the vibration direction of the transducing device 12 can gradually decrease. Similarly, in the direction from the connecting point (e.g. point 7B) between the second transition section 1332 and the second connecting section 134 to the aforementioned reference position point, the included angle between the tangent (e.g. dotted line TL2) of the second transition section 1332 towards the recessed area 135 and the vibration direction of the transducing device 12 can gradually decrease, so that the recessed area 135 can be recessed towards the back cavity 112. Further, the included angle between the tangent (e.g. dotted line TL3) of the third transition section 1333 towards the recessed area 135 and the vibration direction of the transducing device 12 can remain unchanged or gradually increase. Similarly, the included angle between the tangent (e.g. dotted line TL4) of the fourth transition section 1334 towards the recessed area 135 and the vibration direction of the transducing device 12 can remain unchanged or gradually increase. At this time, the fifth transition section 1335 can be arranged in an arc shape.

[0075] As an example, the fifth transition section 1335 can be arranged in a circular arc shape, and the circular arc radius can be greater than or equal to 0.2 mm. In combination with Figure 6 In combination with (a) or (b) of the above, the included angle between the tangent of the third transition section 1333 towards the recessed area 135 and the vibration direction of the transducing device 12 can be zero. Similarly, the included angle between the tangent of the fourth transition section 1334 towards the recessed area 135 and the vibration direction of the transducing device 12 can be zero. At this time, the circular arc radius of the fifth transition section 1335 can be equal to half of the half-depth width W1 of the recessed area 135. Of course, in combination with Figure 6In the middle (c) or (d), the included angle between the tangent of the third transition section 1333 toward the side of the recessed area 135 and the vibration direction of the transducing device 12 can be zero; and the included angle between the tangent of the fourth transition section 1334 toward the side of the recessed area 135 and the vibration direction of the transducing device 12 can be a constant value greater than zero. At this time, the fourth transition section 1334 can be tangent to the fifth transition section 1335.

[0076] Further, the projection length of the first transition section 1331 in the vertical direction of the vibration direction of the transducing device 12 can be defined as W3, the projection length of the second transition section 1332 in the vertical direction can be defined as W4, and the projection length of the fifth transition section 1335 in the vertical direction can be defined as W5, where 0.4≤(W3+W4) / W5≤2.5.

[0077] As an example, the first transition section 1331 and the second transition section 1332 can be respectively provided in a circular arc shape. Wherein, the circular arc radius R1 of the first transition section 1331 can be greater than or equal to 0.2mm, and the circular arc radius R2 of the second transition section 1332 can be greater than or equal to 0.3mm, so as to avoid the local bending degree of the wrinkle part 133 being too large, thereby increasing the reliability of the diaphragm 13. Of course, in other embodiments, the first transition section 1331 can include a circular arc segment and a flat segment connected to each other, the circular arc segment is connected to the third transition section 1333, and the flat segment is connected to the first connecting part 132; the second transition section 1332 can also be similar to the first transition section 1331.

[0078] Based on the above detailed description, and in combination with Figure 7 The thickness of the diaphragm body 131 can be 0.1mm. Wherein, W1≥0.9mm is optional, 0.3mm≤H≤1.0mm is optional; W3+W4≥0.3mm is optional. Further, when 0.3mm≤W3+W4≤1.0mm, W2 or W5≥0.4mm is optional; when 0.4mm≤W3+W4≤0.7mm, W2 or W5≥0.5mm is optional. In a specific embodiment, W2 or W5=0.4mm, W3=0.42mm, W4=0.45mm; H=0.55mm.

[0079] In combination with Figure 7 and Figure 5In the vibration direction of the transducing device 12, the distance from the connecting point (e.g. point 7A) between the corrugated portion 133 and the first connecting portion 132 to the outer end surface of the front cavity 111 away from the magnetic circuit system 122 can be defined as d1, and the distance from the central region of the spring sheet 124 to the outer end surface of the front cavity 111 away from the magnetic circuit system 122 can be defined as d2, where 0.3≤d1 / d2≤0.8. At this time, since the size of the distance d2 can be relatively determined, the size of the distance d1 can be adjusted based on the distance d2 so as to adjust the specific position where the corrugated portion 133 is connected to the first connecting portion 132. Further, the distance from the geometric center (e.g. point G) of the magnet 1222 to the outer end surface of the front cavity 111 away from the magnetic circuit system 122 can be defined as d3, where 0.7≤d1 / d3≤2. At this time, since the size of the distance d3 can be relatively determined, the size of the distance d1 can also be adjusted based on the distance d3 so as to adjust the specific position where the corrugated portion 133 is connected to the first connecting portion 132. In this way, one end of the magnetic circuit system 122 can be connected to the movement housing 11 through the spring sheet 124 and the coil support 121, and the other end of the magnetic circuit system 122 can be connected to the movement housing 11 through the diaphragm 13, i.e. the spring sheet 124 and the diaphragm 13 can respectively fix the two ends of the magnetic circuit system 122 on the movement housing 11 in the vibration direction of the transducing device 12, so that the stability of the magnetic circuit system 122 can be greatly improved.

[0080] For example, d1≥d3, so that in the vibration direction of the transducing device 12, the connecting point between the corrugated portion 133 and the first connecting portion 132 is located between the outer end surface of the front cavity 111 and the geometric center of the magnet 1222. Figure 2 The sound hole 113 can be at least partially located between the above connecting point and the above outer end surface. In this way, the volume of the rear cavity 112 can be as large as possible while the stability of the magnetic circuit system 122 is increased as much as possible, and the position of the sound hole 113 on the movement housing 11 and the size of the sound hole 113 can be as large as possible while the design space of the sound hole 113 on the movement housing 11 is increased as much as possible, so as to flexibly set the sound hole 113.

[0081] Based on the above description, and in combination with Figure 5 Taking the side of the bottom plate 1223 away from the cylindrical side plate 1224 as a reference datum, the distance d1 can also be regarded as the distance between the second connecting portion 134 and the bottom plate 1223, the distance d2 can also be regarded as the distance between the spring sheet 124 and the bottom plate 1223, and the distance d3 can also be regarded as the distance between the geometric center of the magnet 1222 and the bottom plate 1223. In a specific embodiment, d1=2.85mm, d2=4.63mm, and d3=1.78mm.

[0082] Further, the distance between the projections of the connection points (e.g. point 7A) between the first connecting portion 132 and the corrugated portion 133 and the connection points (e.g. point 7B) between the second connecting portion 134 and the corrugated portion 133 in the vibration direction of the transducing device 12 can be defined as d4, where 0≤d4 / W2≤1.8. At this time, the specific position where the corrugated portion 133 connects with the first connecting portion 132 can also be adjusted. Among them, in combination with Figure 6 in (a) or (c), the connection points between the first connecting portion 132 and the corrugated portion 133 and the connection points between the second connecting portion 134 and the corrugated portion 133 can coincide in the projection in the vibration direction of the transducing device 12, that is, d4=0. Of course, in combination with Figure 6 in (b) or (d), the connection points (e.g. point 7A) between the first connecting portion 132 and the corrugated portion 133 and the connection points (e.g. point 7B) between the second connecting portion 134 and the corrugated portion 133 can be staggered with each other in the projection in the vibration direction of the transducing device 12, that is, d4>0.

[0083] in combination with Figure 8 and Figure 2 The movement core module 10 can further include a sound guide component 14 connected with the movement core shell 11. The sound guide component 14 is provided with a sound guide channel 141, which is in communication with the sound outlet hole 113 and is used to guide the aforementioned air conduction sound to the human ear. In other words, the sound guide component 14 can be used to change the propagation path / direction of the aforementioned air conduction sound, thereby changing the directivity of the aforementioned air conduction sound; and can be used to shorten the distance between the sound outlet hole 113 and the human ear, thereby increasing the intensity of the aforementioned air conduction sound. In addition, the sound guide component 14 can also make the air conduction sound more deviate from the rear end surface (e.g. the area where the rear bottom plate 1151 is located) of the earphone 100 which is opposite to the area where the movement core shell 11 contacts with the skin, so as to improve the phase cancellation of the sound leakage at the rear bottom plate 1151 to the sound at the sound outlet hole 113. In this way, the user can better hear the aforementioned air conduction sound when wearing the earphone 100.

[0084] Generally, in order to ensure the sound quality, the frequency response curve should be relatively flat in a wide frequency band, that is, the resonance peak needs to be as high as possible. Among them, the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 has a resonance peak, and the peak resonance frequency of the resonance peak can be greater than or equal to 1 kHz; preferably, the peak resonance frequency can be greater than or equal to 2 kHz, so that the earphone 100 has a better voice output effect; more preferably, the peak resonance frequency can be greater than or equal to 3.5 kHz, so that the earphone 100 has a better music output effect; the peak resonance frequency can be further greater than or equal to 4.5 kHz.

[0085] Based on the above description, the sound guide passage 141 communicates with the back cavity 112 through the sound hole 113, and can form a typical Helmholtz resonance cavity structure. Based on the Helmholtz resonance cavity model, the resonance frequency f satisfies the relationship between the volume V of the back cavity 112, the cross-sectional area S of the sound guide passage 141, the equivalent radius R, and the length L of the sound guide passage 141: f∝[S / (VL+1.7VR)] 1 / 2 Obviously, in the case of a certain volume of the back cavity 112, increasing the cross-sectional area of the sound guide passage 141 and / or reducing the length of the sound guide passage 141 can increase the resonance frequency, thereby moving the above-mentioned air conduction sound to a high frequency as much as possible.

[0086] For example, the length of the sound guide passage 141 can be less than or equal to 7 mm. Preferably, the length of the sound guide passage 141 can be between 2 mm and 5 mm. In the vibration direction of the transducer device 12, the distance between the outlet end of the sound guide passage 141 and the back end surface of the movement core shell 11 away from the above-mentioned skin contact area can be greater than or equal to 3 mm, thereby avoiding the phase cancellation of the air conduction sound of the outlet end of the sound guide passage 141 caused by the leakage of the back end surface of the movement core shell 11.

[0087] For example, the cross-sectional area of the sound guide passage 141 can be greater than or equal to 4.8 mm 2 Preferably, the cross-sectional area of the sound guide passage 141 can be greater than or equal to 8 mm 2 Further, in combination with Figure 2 , the cross-sectional area of the sound guide passage 141 can gradually increase along the transmission direction of the above-mentioned air conduction sound (i.e. in the direction away from the sound hole 113), so that the sound guide passage 141 can be provided in a horn shape; and can extend towards the front shell 116 to guide the above-mentioned air conduction sound. The cross-sectional area of the inlet end of the sound guide passage 141 can be greater than or equal to 10 mm 2 ; or the cross-sectional area of the outlet end of the sound guide passage 141 can be greater than or equal to 15 mm 2 .

[0088] For example, the ratio between the volume of the sound guide passage 141 and the volume of the back cavity 112 can be between 0.05 and 0.9. The volume of the back cavity 112 can be less than or equal to 400 mm 3 . Preferably, the volume of the back cavity 112 can be between 200 mm 3 and 400 mm 3 .

[0089] In an embodiment, the sound guide passage 141 can be arranged in a horn shape. The length of the sound guide passage 141 can be 2.5 mm, and the cross-sectional areas of the inlet end and the outlet end of the sound guide passage 141 can be 15 mm 2 , 25.3 mm 2 , respectively. Further, the volume of the back cavity 112 can be 350 mm 3 .

[0090] In combination Figure 8 , Figure 8 , (a) to (e) mainly illustrate various structural variations of the sound guide component 14, and the main difference between them is the specific structure of the sound guide passage 141. Among them, for Figure 8 , (a) to (c), the sound guide passage 141 can be simply regarded as a bent arrangement; and for Figure 8 , (d) to (e), the sound guide passage 141 can be simply regarded as a straight-through arrangement. Obviously, the aforementioned air conduction will be different with the structural difference of the sound guide passage 141, and specifically:

[0091] For Figure 8 , (a), the sound direction of the sound guide passage 141 points to the face of the user, and can increase the distance from the outlet end of the sound guide passage 141 to the aforementioned back end surface, thereby optimizing the directivity and intensity of the aforementioned air conduction.

[0092] For Figure 8 , (b), the sound direction of the sound guide passage 141 points to the pinna of the user, so that the aforementioned air conduction is more easily collected into the ear canal by the pinna, thereby optimizing the intensity of the aforementioned air conduction.

[0093] For Figure 8 , (c), the sound direction of the sound guide passage 141 also points to the ear canal of the user, and can also optimize the intensity of the aforementioned air conduction. At the same time, the outlet end of the sound guide passage 141 adopts an inclined outlet, which makes the actual area of the outlet end of the sound guide passage 141 not limited by the cross-sectional area of the sound guide passage 141, which is equivalent to increasing the cross-sectional area of the sound guide passage 141, thereby facilitating the output of the aforementioned air conduction.

[0094] For Figure 8 , (d), the wall surface of the sound guide passage 141 is a plane, which is convenient for mold removal during manufacturing.

[0095] For Figure 8 , (e), the wall surface of the sound guide passage 141 is a curved surface, which is conducive to realizing the acoustic impedance matching between the sound guide passage 141 and the atmosphere, thereby facilitating the output of the aforementioned air conduction.

[0096] It is to be noted that the cross-sectional area of a certain point of the sound guide channel 141 refers to the minimum area that can be cut off by cutting the sound guide channel 141 at the point. Further, the straight-through sound guide channel refers to that the entire of the other end can be observed from any one of the inlet end and the outlet end of the sound guide channel 141. At this time, for example Figure 8 For the straight-through sound guide channel shown in (d) to (e) of Figure 8 , the length of the sound guide channel 141 can be calculated in the following manner: first, the geometric center of the inlet end (e.g., point 8A) and the geometric center of the outlet end (e.g., point 8B) of the sound guide channel 141 are determined; then, the geometric centers are connected to form a line segment 8A-8B, and the length of the line segment is simply regarded as the length of the sound guide channel 141. Correspondingly, the bent sound guide channel refers to that the other end cannot be observed from any one of the inlet end and the outlet end of the sound guide channel 141 or only a part of the other end can be observed. At this time, for example Figure 8 , the bent sound guide channel can be divided into two or more straight-through sub-guide channels, and the sum of the lengths of the straight-through sub-guide channels is regarded as the length of the bent sound guide channel. For example, in (a) to (c) of Figure 2 , the geometric centers of the faces where the intermediate bends are located (e.g., points 8C1, 8C2) are further determined, and then the geometric centers are connected to form a line segment 8A-8C1-8B (or 8A-8C1-8C2-8B), and the length of the line segment is simply regarded as the length of the sound guide channel 141.

[0097] In combination with Figure 9 , the outlet end of the sound guide channel 141 is generally covered with a sound resistance net 140, which can be used to adjust the sound resistance of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113, so as to weaken the peak resonance frequency of the resonance peak of the air conduction sound in the medium-high frequency band or the high frequency band, so that the frequency response curve is smoother and the sound listening effect is better. In addition, the sound resistance net 140 can also separate the back cavity 112 from the outside to some extent, so as to increase the waterproof and dustproof performance of the core module 10. The sound resistance of the sound resistance net 140 can be less than or equal to 260 MKSrayls. Specifically, the porosity of the sound resistance net 140 can be greater than or equal to 13%, and / or the pore size can be greater than or equal to 18 μm.

[0098] As an example, in combination with Frequency response curve, the sound resistance of the sound resistance net 140 can be affected by the wire diameter, the density and other factors of the gauze wire. Based on this, every four gauze wires intersecting with each other among the longitudinally spaced and transversely spaced gauze wires can form a pore. Among them, the area surrounded by the center line of the gauze wire can be defined as S1, and the area actually surrounded by the edge of the gauze wire (i.e. the pore) can be defined as S2. Then the porosity can be defined as S2 / S1. Further, the pore size can be represented as the distance between any two adjacent gauze wires, for example, the side length of the pore.

[0099] Further, the effective area of a certain specific through hole or opening introduced in the following of the present application can be defined as the product of its actual area and the porosity of the sound resistance net covering it. For example: when the outlet end of the sound guide channel 141 is covered with the sound resistance net 140, the effective area of the outlet end of the sound guide channel 141 is the product of the actual area of the outlet end of the sound guide channel 141 and the porosity of the sound resistance net 140; and when the outlet end of the sound guide channel 141 is not covered with the sound resistance net 140, the effective area of the outlet end of the sound guide channel 141 is the actual area of the outlet end of the sound guide channel 141. Similarly, the effective area of the outlet end of the pressure relief hole, sound adjustment hole and other through holes mentioned in the following can also be defined as the product of the actual area and the corresponding porosity, which will not be repeated here.

[0100] Based on the above description, in addition to hearing bone conduction sound, the user mainly hears air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 and the sound guide channel 141, rather than air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114. Therefore, the effective area of the outlet end of the sound guide channel 141 can be designed to be larger than that of the pressure relief hole 114.

[0101] Further, the size of the pressure relief hole 114 affects the smoothness of the exhaust of the front cavity 111, the difficulty of the vibration of the diaphragm 13, and further affects the acoustic performance of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113. Therefore, under the condition that the effective area of the outlet end of the sound guide channel 141 is constant, for example, the actual area of the outlet end of the sound guide channel 141 and / or the porosity of the sound resistance net 140 is constant, in combination with the following table, adjusting the effective area of the outlet end of the pressure relief hole 114, for example, the actual area of the outlet end of the pressure relief hole 114 and / or the sound resistance of the sound resistance net 1140 covering it, can change the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113. Among them, the sound resistance of 0 in the present application can be simply regarded as not covering the sound resistance net.

[0102] Acoustic resistance / MKS rayls Actual area / mm 2 ]] Porosity Figure 10 10-1 31.57 0 100％ 10-2 2.76 0 100％ 10-3 2.76 1000 3％

[0103] In combination with Figure 11, with the increase of the actual area of the outlet end of the pressure relief hole 114, the exhaust of the front cavity 111 becomes more smooth, and the peak resonance strength of the low frequency band or the low-mid frequency band increases significantly; with the addition of the sound resistance net 1140 on the outlet end of the pressure relief hole 114, the exhaust of the front cavity 111 is affected to a certain extent, so that the low-mid frequency of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 decreases, and the frequency response curve is relatively flat.

[0104] In combination with the following table, adjusting the actual area of the outlet end of the pressure relief hole 114 and the sound resistance of the sound resistance net 1140 arranged thereon can realize the combination of pressure relief holes 114 of different sizes and sound resistance nets 1140 of different sound resistances, so as to make the frequency response curves of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 generally consistent. If the sound resistance net 1140 with a porosity of 14% can be simply regarded as a single-layer net, then the sound resistance net 1140 with a porosity of 7% can be simply regarded as a double-layer net.

[0105]

[0106] In combination with Figure 12 , the larger the actual area of the outlet end of the pressure relief hole 114 is, the larger the sound resistance of the corresponding sound resistance net should be, so that the effective area of the outlet end of the pressure relief hole 114 can be generally consistent, the exhaust smoothness of the front cavity 111 is generally the same, and then the frequency response curves of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 are generally consistent. However, in combination with Figure 13 , although the frequency response curves of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 are generally consistent, the frequency response curves of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 are not the same, that is, the leakage sound at the pressure relief hole 114 is not the same. With the increase of the actual area of the outlet end of the pressure relief hole 114 and the increase of the sound resistance of the sound resistance net 1140, the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 is generally downward, that is, the leakage sound at the pressure relief hole 114 is weakened. In other words, under the condition that the frequency response curve of the air conduction sound at the sound guide component 14 is generally unchanged, the size of the pressure relief hole 114 can be increased as much as possible, and the sound resistance of the sound resistance net 1140 on the pressure relief hole 114 can be increased at the same time, so that the leakage sound at the pressure relief hole 114 is as small as possible. As can be seen, under the premise that the effective area of the outlet end of the pressure relief hole 114 is less than or equal to 2.76mm 2 , the leakage sound at the pressure relief hole 114 can be reduced by increasing the actual area of the outlet end of the pressure relief hole 114 and the porosity of the sound resistance net 1140.

[0107] It should be noted that due to the limited size of the movement core shell 11, a single pressure relief hole 114 cannot be too large. Based on this, the pressure relief hole 114 can be arranged as at least one or at least two, for example, three as described below.

[0108] Based on the above detailed description, the effective area of the outlet end of the sound guide channel 141 can be greater than the effective area of the outlet end of each pressure relief hole 114, so as to facilitate the user to hear the air conduction sound outputted to the outside of the earphone 100 through the sound outlet hole 113. Wherein, based on the definition of the effective area, the actual area of the outlet end of the sound guide channel 141 can be greater than the actual area of the outlet end of each pressure relief hole 114. Further, the effective area of the outlet end of the sound guide channel 141 can be greater than or equal to the sum of the effective areas of the outlet ends of all pressure relief holes 114. Wherein, the ratio between the sum of the effective areas of the outlet ends of all pressure relief holes 114 and the effective area of the outlet end of the sound guide channel 141 can be greater than or equal to 0.15. As an example, the effective area of the outlet end of each pressure relief hole 114 can be greater than or equal to 2.5mm 2 . In this way, to ensure the smooth exhaust of the front cavity 111, thereby facilitating the improvement of the acoustic performance of the air conduction sound outputted to the outside of the earphone 100 through the sound outlet hole 113, and reducing the leakage of sound at the pressure relief hole 114.

[0109] As an example, the actual area of the outlet end of the sound guide channel 141 can be greater than or equal to 4.8mm 2 . Preferably, the actual area of the outlet end of the sound guide channel 141 can be greater than or equal to 8mm 2 . Correspondingly, the sum of the actual areas of the outlet ends of all pressure relief holes 114 can be greater than or equal to 2.6mm 2 . Preferably, the actual area of the outlet end of each pressure relief hole 114 can be greater than or equal to 10mm 2 . Wherein, when the number of pressure relief holes 114 is one, the sum of the actual areas of the outlet ends of all pressure relief holes 114 is the actual area of the outlet end of one pressure relief hole 114; the same applies to the sound adjustment hole 117. In a specific embodiment, the actual area of the outlet end of the sound guide channel 141 can be 25.3mm 2 ; the pressure relief holes 114 can be provided with three, for example, the first pressure relief hole 1141, the second pressure relief hole 1142, and the third pressure relief hole 1143 mentioned hereinafter, the actual areas of the outlet ends of which can be 11.4mm 2 , 8.4mm 2 , 5.8mm 2 , respectively.

[0110] Further, the outlet end of the sound guide channel 141 can be covered with a sound resistance net 140, and the outlet end of at least part of the pressure relief holes 114 can be covered with a sound resistance net 1140. Wherein, the porosity of the sound resistance net 1140 can be less than or equal to the porosity of the sound resistance net 140. In a specific embodiment, the porosity of the sound resistance net 140 can be greater than or equal to 13%, and the porosity of the sound resistance net 1140 can be greater than or equal to 7%.

[0111] Based on the above description, the sound guide channel 141 communicates with the back cavity 112 through the sound hole 113, which can form a typical Helmholtz resonance cavity structure and has a resonance peak. We can study the distribution of sound pressure in the back cavity 112 when the Helmholtz resonance cavity structure resonates. Among them, combined with Figure 13 (a), a high pressure area away from the sound hole 113 and a low pressure area close to the sound hole 113 will be formed in the back cavity 112. Further, when the Helmholtz resonance cavity structure resonates, it can be considered that a standing wave occurs in the back cavity 112. Among them, the wavelength of the standing wave corresponds to the size of the back cavity 112, for example, the deeper the back cavity 112, that is, the longer the distance between the low pressure area and the high pressure area, the longer the wavelength of the standing wave, resulting in a lower resonance frequency of the Helmholtz resonance cavity structure. Based on this, combined with Figure 2 (b), by destroying the high pressure area, for example, by setting a through hole communicating with the back cavity 112 in the high pressure area, the sound that was originally reflected in the high pressure area cannot be reflected, and thus the aforementioned standing wave cannot be formed. At this time, when the Helmholtz resonance cavity structure resonates, the high pressure area in the back cavity 112 will move inward towards the low pressure area, so that the wavelength of the standing wave is shortened, thereby increasing the resonance frequency of the Helmholtz resonance cavity structure.

[0112] Combined with Figure 14 , the core shell 11 can also be provided with a sound adjustment hole 117 communicating with the back cavity 112. Among them, under the same conditions, the sound adjustment hole 117 arranged in the high pressure area in the back cavity 112 can most effectively destroy the high pressure area. Of course, the sound adjustment hole 117 can also be arranged in any region between the high pressure area and the low pressure area in the back cavity 112. As an exemplary, the sound adjustment hole 117 can be arranged in the rear shell 115, and can be arranged opposite to the sound hole 113 and its sound guide component 14 on both sides of the transducer device 12.

[0113] Further, combined with Frequency response curve , the frequency response curve of the air guide sound output to the outside of the earphone 100 through the sound hole 113 has a resonance peak. Combined with the table below, adjusting the actual area of the outlet end of the sound adjustment hole 117 can control the degree of destruction of the sound adjustment hole to the above-mentioned high pressure area, thereby adjusting the peak resonance frequency of the resonance peak. Among them, the actual area of the outlet end of the sound adjustment hole 117 is 0, which can be regarded as the sound adjustment hole 117 being in a closed state.

[0114] Figure 14 Actual area / mm 2 ]]> 14-1 0 14-2 1.7 14-3 2.8 14-4 28.44

[0115] Combined with Figure 14The greater the actual area of the outlet end of the sound adjustment hole 117, the more obvious the destruction effect on the high pressure area, and the higher the peak resonance frequency of the resonance peak. The peak resonance frequency of the resonance peak when the sound adjustment hole 117 is in the open state is offset to a high frequency compared to the peak resonance frequency of the resonance peak when the sound adjustment hole 117 is in the closed state, and the offset amount can be greater than or equal to 500 Hz. Preferably, the aforementioned offset amount is greater than or equal to 1 kHz. Further, the peak resonance frequency of the resonance peak when the sound adjustment hole 117 is in the open state can be greater than or equal to 2 kHz, so that the earphone 100 has a better voice output effect. Preferably, the peak resonance frequency can be greater than or equal to 3.5 kHz, so that the earphone 100 has a better music output effect; the peak resonance frequency can be further greater than or equal to 4.5 kHz.

[0116] It should be noted that due to the limited size of the movement shell 11, a single sound adjustment hole 117 cannot be too large. Based on this, the sound adjustment hole 117 can be provided as at least one, for example, two as described below.

[0117] Similarly, in addition to hearing bone conduction sound, the user mainly hears air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113, rather than air conduction sound output to the outside of the earphone 100 through the sound adjustment hole 117. Therefore, the effective area of the outlet end of the sound guide channel 141 can be designed to be larger than that of the sound adjustment hole 117.

[0118] In combination Figure 13 and Figure 2 Due to the addition of the sound adjustment hole 117 to the back cavity 112, a part of the sound leaks out from the sound adjustment hole 117, that is, the sound adjustment hole 117 forms a sound leakage, which causes the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 to be shifted downward as a whole. Therefore, in combination Frequency response curve , the outlet end of at least part of the sound adjustment hole 117 can be covered with a sound resistance net 1170 to destroy the high pressure area in the back cavity 112 while as much as possible avoiding sound from leaking out from the sound adjustment hole 117. In combination with the following table, adjusting the effective area of the outlet end of the sound adjustment hole 117, such as the actual area of the outlet end of the sound adjustment hole 117 and / or the sound resistance of the sound resistance net 1170 covered thereon, can cause the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 to change.

[0119] Acoustic resistance / MKS rayls Untuned port 15-1 Figure 15 15-2 0 15-3 145

[0120] In combination Figure 16, the sound resistance net 1170 is additionally arranged at the outlet end of the tuning hole 117, which can ensure that there is no significant reflected sound (i.e., no standing wave, non-hard sound field boundary) at the tuning hole 117 in the rear cavity 112, so that the high pressure area in the rear cavity 112 is moved inward, and can also avoid the sound from leaking out of the tuning hole 117 to a certain extent, so that the sound can be output to the outside of the earphone 100 through the sound outlet hole 113. Further, the peak resonance strength of the middle and low frequency band is obviously increased, the volume of the air conduction sound is increased, and the peak resonance strength of the high frequency band is also reduced to a certain extent, so that the frequency response curve is more flat in the high frequency band, and the sound quality of the high frequency is more balanced.

[0121] Based on the above detailed description, the effective area of the outlet end of the sound guide channel 141 can be greater than the effective area of the outlet end of each tuning hole 117, so that the user can hear the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113. Wherein, based on the definition of the effective area, the actual area of the outlet end of the sound guide channel 141 can be greater than the actual area of the outlet end of each tuning hole 117. Further, the effective area of the outlet end of the sound guide channel 141 can be greater than the sum of the effective areas of the outlet ends of all the tuning holes 117. Wherein, the ratio between the sum of the effective areas of the outlet ends of all the tuning holes 117 and the effective area of the outlet end of the sound guide channel 141 can be greater than or equal to 0.08. As an example, the sum of the effective areas of the outlet ends of all the tuning holes 117 can be greater than or equal to 1.5mm 2 . Wherein, when the number of the tuning holes 117 is one, the sum of the effective areas of the outlet ends of all the tuning holes 117 is the effective area of the outlet end of one tuning hole 117; the pressure relief hole 114 is similar. In this way, the peak resonance frequency of the resonance peak of the air conduction sound output to the outside of the earphone 100 through the sound outlet hole 113 can be shifted to the high frequency as much as possible, and the sound leakage at the tuning hole 117 can be reduced.

[0122] As an example, the sum of the actual areas of the outlet ends of all the tuning holes 117 can be greater than or equal to 5.6mm 2 . In a specific embodiment, two tuning holes 117 can be arranged, for example, the first tuning hole 1171 and the second tuning hole 1172 mentioned below, and the actual areas of the outlet ends thereof can be 7.6mm 2 , 5.6mm 2 , respectively.

[0123] Further, the outlet end of the sound guide channel 141 can be covered with a sound resistance net 140, and the outlet end of at least part of the tuning holes 117 can be covered with a sound resistance net 1170. Wherein, the porosity of the sound resistance net 1170 can be less than or equal to the porosity of the sound resistance net 140. In a specific embodiment, the porosity of the sound resistance net 140 can be greater than or equal to 13%, and the porosity of the sound resistance net 1170 can be less than or equal to 16%.

[0124] Based on the above description, for the pressure relief hole 114 and the sound outlet hole 113, the phases of the air conduction sound output to the outside of the earphone 100 through the two holes are opposite, so that the pressure relief hole 114 and the sound outlet hole 113 should be staggered as much as possible in three-dimensional space to avoid the air conduction sound output to the outside of the earphone 100 through the two holes to be coherent and destructive. Therefore, the pressure relief hole 114 is as far away from the sound outlet hole 113 as possible. For the sound tuning hole 117 and the sound outlet hole 113, if the area where the sound outlet hole 113 is located can be simply regarded as a low-pressure area in the back cavity 112, the area farthest from the area where the sound outlet hole 113 is located in the back cavity 112 can be simply regarded as a high-pressure area in the back cavity 112; and the sound tuning hole 117 can be preferably arranged in the high-pressure area in the back cavity 112 to destroy the original high-pressure area and make it move to the low-pressure area. Therefore, the sound tuning hole 117 is as far away from the sound outlet hole 113 as possible.

[0125] Further, since the pressure relief hole 114 is in communication with the front cavity 111, and the sound tuning hole 117 is in communication with the back cavity 112, the phases of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound tuning hole 117 are opposite, so that the leakage sound from the pressure relief hole 114 and the sound tuning hole 117 can be reduced by coherent destructive interference. Based on this, at least part of the pressure relief hole 114 and at least part of the sound tuning hole 117 can be arranged adjacent to each other to create conditions for coherent destructive interference. In order to better let the leakage sound of the pressure relief hole 114 and the sound tuning hole 117 be coherent and destructive, the spacing distance between the two should be as small as possible, for example, the minimum distance between the outlines of the outlet ends of the pressure relief hole 114 and the sound tuning hole 117 is less than or equal to 2 mm. In addition, the peak resonance frequency and / or peak resonance strength of the resonance peaks of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound tuning hole 117 should also be matched as much as possible. However, in actual product design, due to the influence of specific structure and process tolerance, it is generally difficult to control the peak resonance frequency and / or peak resonance strength of the resonance peaks of the two air conduction sounds to be exactly the same, so in the design, the peak resonance frequency and / or peak resonance strength of the resonance peaks of the two air conduction sounds should be ensured not to be too different.

[0126] In combination Frequency response curve, the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 has a first resonance peak f1, and the frequency response curve of the air conduction sound output to the outside of the earphone 100 through the sound adjustment hole 117 has a second resonance peak f2. In combination with the following table, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak can be greater than or equal to 2 kHz, respectively, and |f1-f2| / f1≤60%. As the difference between the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak gradually decreases, the frequency width of the leakage sound can be wider, that is, the frequency response curve is relatively flat, which means that the leakage sound of the earphone 100 is reduced, that is, the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 respectively is better in coherent cancellation. Preferably, the peak resonance frequency of the first resonance peak and the peak resonance frequency of the second resonance peak can be greater than or equal to 3.5k, respectively, and |f1-f2|≤2kHz. In this way, the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 respectively can be as coherent as possible in the high frequency band.

[0127] Peak resonance frequency of fl / Hz Peak resonance frequency of f2 / Hz Figure 17 16-1 3500 5600 16-2 4500 5600 16-3 5000 5600

[0128] Further, due to the structure of the coil support 121, the spring sheet 124 and the like arranged in the front cavity 111, the wavelength of the standing wave in the front cavity 111 is relatively long; the sound adjustment hole 117 and the sound outlet hole 113 can destroy the high pressure area with each other, so that the wavelength of the standing wave in the rear cavity 112 is relatively short. In this way, the peak resonance frequency of the first resonance peak is generally less than the peak resonance frequency of the second resonance peak. In order to make the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 and the sound adjustment hole 117 respectively better in coherent cancellation, the peak resonance frequency of the first resonance peak should be as high as possible to be offset to the frequency as close as possible to the peak resonance frequency of the second resonance peak. For this purpose, based on the Helmholtz resonance cavity model, the effective area of the outlet end of the pressure relief hole 114 in the adjacent pressure relief hole 114 and sound adjustment hole 117 can be greater than the effective area of the outlet end of the sound adjustment hole 117. In combination with the following table, the ratio between the effective area of the outlet end of the pressure relief hole 114 in the adjacent pressure relief hole 114 and sound adjustment hole 117 and the effective area of the outlet end of the sound adjustment hole 117 can be less than or equal to 2. As an example, the actual area of the outlet end of the pressure relief hole 114 in the adjacent pressure relief hole 114 and sound adjustment hole 117 can be greater than the actual area of the outlet end of the sound adjustment hole 117. Further, the outlet ends of the adjacent pressure relief hole 114 and sound adjustment hole 117 can be respectively covered with a sound resistance net 1140 and a sound resistance net 1170, and the porosity of the sound resistance net 1140 can be greater than the porosity of the sound resistance net 1170.

[0129] In combination with Figure 17In the middle (a), the pressure relief hole 114 can include a first pressure relief hole 1141 and a second pressure relief hole 1142. Among them, the first pressure relief hole 1141 can be arranged away from the sound outlet hole 113 compared with the second pressure relief hole 1142. At this time, the effective area of the outlet end of the first pressure relief hole 1141 can be greater than the effective area of the outlet end of the second pressure relief hole 1142. In this way, both the size of the core shell 11 and the exhaust demand of the front cavity 111 can be considered, and the first pressure relief hole 1141 with relatively large exhaust volume can be arranged as far away from the sound outlet hole 113 as possible, thereby reducing the influence of the sound leakage at the pressure relief hole 114 on the sound guiding at the sound outlet hole 113. Further, the pressure relief hole 114 can also include a third pressure relief hole 1143, and the first pressure relief hole 1141 can also be arranged away from the sound outlet hole 113 compared with the third pressure relief hole 1143. Among them, the effective area of the outlet end of the second pressure relief hole 1142 can be greater than the effective area of the outlet end of the third pressure relief hole 1143.

[0130] As an example, in combination with Figure 2 In the middle (a) and Figure 17 , the sound outlet hole 113 and the first pressure relief hole 1141 can be located on opposite sides of the transducer device 12; and the second pressure relief hole 1142 and the third pressure relief hole 1143 can be arranged opposite to each other and can be located between the sound outlet hole 113 and the first pressure relief hole 1141.

[0131] Further, at least part of the outlet end of the pressure relief hole 114 can be covered with an acoustic resistance net 1140 to adjust the effective area of the outlet end of the pressure relief hole 114. Among them, the present embodiment takes the example of covering the outlet end of the pressure relief hole 114 with the acoustic resistance net 1140 with the same acoustic resistance. In this way, not only the acoustic performance and waterproof and dustproof performance of the earphone 100 can be improved, but also the mixing of the acoustic resistance net 1140 due to too many specifications can be avoided. Based on this, adjusting the actual area of the outlet end of the pressure relief hole 114 can obtain the corresponding effective area. For example: the actual area of the outlet end of the first pressure relief hole 1141 can be greater than the actual area of the outlet end of the second pressure relief hole 1142, and the actual area of the outlet end of the second pressure relief hole 1142 can be greater than the actual area of the outlet end of the third pressure relief hole 1143.

[0132] In combination with Figure 17In the middle (b), the sound adjustment hole 117 can include a first sound adjustment hole 1171 and a second sound adjustment hole 1172. Among them, the first sound adjustment hole 1171 can be arranged away from the sound outlet hole 113 compared with the second sound adjustment hole 1172. At this time, the effective area of the outlet end of the first sound adjustment hole 1171 can be greater than the effective area of the outlet end of the second sound adjustment hole 1172, so as to destroy the high pressure area in the back cavity 112. In this way, both the size of the core shell 11 and the demand for destroying the high pressure area of the back cavity 112 of the sound adjustment hole 117 can be considered, and the resonance frequency of the air conduction sound at the sound outlet hole 113 is as high as possible, and the first sound adjustment hole 1171 with relatively large destruction degree is as far away from the sound outlet hole 113 as possible.

[0133] As an example, in combination with Figure 2 In the middle (b) and Figure 17 , the sound outlet hole 113 and the first sound adjustment hole 1171 can be located on opposite sides of the transducer device 12; and the second sound adjustment hole 1172 can be located between the sound outlet hole 113 and the first sound adjustment hole 1171.

[0134] Further, at least part of the outlet end cover of the sound adjustment hole 117 can be provided with a sound resistance net 1170, so as to adjust the effective area of the outlet end of the sound adjustment hole 117. Among them, the embodiment takes the outlet end of the sound adjustment hole 117 as an example for exemplary description, which is respectively covered with sound resistance nets 1170 with the same sound resistance. In this way, not only the acoustic performance and waterproof and dustproof performance of the earphone 100 can be improved, but also the sound resistance nets 1170 can be avoided from being mixed due to too many specifications. Based on this, adjusting the actual area of the outlet end of the sound adjustment hole 117 can obtain the corresponding effective area. For example: the actual area of the outlet end of the first sound adjustment hole 1171 can be greater than the actual area of the outlet end of the second sound adjustment hole 1172. Specifically, the actual area of the outlet end of the first sound adjustment hole 1171 can be greater than or equal to 3.8mm 2 ; and / or, the actual area of the outlet end of the second sound adjustment hole 1172 can be greater than or equal to 2.8mm 2 .

[0135] As an example, in combination with Figure 17 In the middle (c) and (d), the first pressure relief hole 1141 and the first sound adjustment hole 1171 can be arranged adjacent to each other, and the second pressure relief hole 1142 and the second sound adjustment hole 1172 can also be arranged adjacent to each other. In this way, the air conduction sound output to the outside of the earphone 100 through the first pressure relief hole 1141 and the first sound adjustment hole 1171 respectively can be mutually destructive, and the air conduction sound output to the outside of the earphone 100 through the second pressure relief hole 1142 and the second sound adjustment hole 1172 respectively can also be mutually destructive.

[0136] Further, the effective area of the outlet end of the first pressure relief hole 1141 can be greater than the effective area of the outlet end of the first sound tuning hole 1171, so that the peak resonance frequency of the air conduction sound output to the outside of the earphone 100 via the first pressure relief hole 1141 is shifted to a high frequency as much as possible, so as to be as close as possible to the peak resonance frequency of the air conduction sound output to the outside of the earphone 100 via the first sound tuning hole 1171, and thus the air conduction sound output to the outside of the earphone 100 via the first pressure relief hole 1141 and the first sound tuning hole 1171, respectively, can be better incoherent cancellation. Similarly, the effective area of the outlet end of the second pressure relief hole 1142 can be greater than the effective area of the outlet end of the second sound tuning hole 1172, which will not be described here again.

[0137] Similarly, the second pressure relief hole 1142 and the third pressure relief hole 1143 will destroy the high pressure area in the front cavity 111, so that the wavelength of the standing wave in the front cavity 111 is reduced, and thus the peak resonance frequency of the air conduction sound output to the outside of the earphone 100 via the first pressure relief hole 1141 can be shifted to a high frequency, so as to be better incoherent cancellation with the air conduction sound output to the outside of the earphone 100 via the first sound tuning hole 1171. Wherein, the shift amount can be greater than or equal to 500Hz, and the peak resonance frequency of the resonance peak can be greater than or equal to 2kHz. Preferably, the shift amount is greater than or equal to 1kHz. Similarly, the peak resonance frequency of the air conduction sound output to the outside of the earphone 100 via the second pressure relief hole 1142 can also be shifted to a high frequency. In short, the frequency response curve of the air conduction sound output to the outside of the earphone 100 via the pressure relief hole 114 arranged adjacent to the sound tuning hole 117 has a resonance peak, and the peak resonance frequency of the resonance peak when the pressure relief hole 114 other than the pressure relief hole 114 arranged adjacent to the sound tuning hole 117 is in an open state is shifted to a high frequency compared with the peak resonance frequency of the resonance peak when the other pressure relief hole 114 is in a closed state. Wherein, the peak resonance frequency of the resonance peak when the other pressure relief hole 114 is in an open state can be greater than or equal to 2kHz.

[0138] In combination Figure 2 and Figure 2, the core housing 11 can include a first side wall 17A and a second side wall 17B located on opposite sides of the transducing device 12, and a third side wall 17C and a fourth side wall 17D connected to the first side wall 17A and the second side wall 17B and spaced from each other. In short, the core housing 11 can be simplified as a rectangular frame. Of course, the third side wall 17C and the fourth side wall 17D can also be arranged in an arc shape, so that the core housing 11 as a whole is arranged in a runway type. Among them, the first side wall 17A is closer to the human ear than the second side wall 17B, and the third side wall 17C is closer to the ear hanging assembly 20 than the fourth side wall 17D. Further, the sound outlet hole 113 can be provided on the first side wall 17A, so as to facilitate the user to hear the air conduction sound output through the sound outlet hole 113 and the sound guide channel 141 to the outside of the earphone 100; The first pressure relief hole 1141 and the first sound adjusting hole 1171 can be respectively provided on the second side wall 17B, so as to be respectively farther away from the sound outlet hole 113. Correspondingly, the second pressure relief hole 1142 and the second sound adjusting hole 1172 can be respectively provided on one of the third side wall 17C and the fourth side wall 17D, and the third pressure relief hole 1143 can be provided on the other one of the third side wall 17C and the fourth side wall 17D.

[0139] Based on the above description, and in combination with Figure 17 and Figure 18 , the pressure relief hole 114 can communicate the front cavity 111 with the outside of the earphone 100, and the sound adjusting hole 117 can communicate the rear cavity 112 with the outside of the earphone 100; and at least part of the pressure relief hole 114 and at least part of the sound adjusting hole 117 can be respectively arranged adjacent to each other, and the distance therebetween can be less than or equal to 2mm, for example, the first pressure relief hole 1141 and the first sound adjusting hole 1171 are arranged adjacent to each other, and the second pressure relief hole 1142 and the second sound adjusting hole 1172 are arranged adjacent to each other. Based on this, the core module 10 can further include a protective cover 15, which can be provided on the periphery of the pressure relief hole 114 and the sound adjusting hole 117. Among them, the protective cover 15 can be woven by metal wires, the wire diameter of the metal wires can be 0.1mm, and the mesh number of the protective cover 15 can be 90-100, so as to have a certain structural strength and good air permeability, which can avoid the intrusion of foreign matters into the inside of the core module 10, and also can not affect the acoustic performance of the earphone 100. In this way, the protective cover 15 can cover the adjacent pressure relief hole 114 and sound adjusting hole 117 at the same time, that is, “one cover covers two holes”, thereby greatly reducing the material, and improving the appearance quality of the earphone 100.

[0140] As an example, in combination with Figure 18The outer surface of the core shell 11 can be provided with a receiving area 118, which can be in communication with the outlet ends of the adjacent pressure relief hole 114 and sound adjustment hole 117. At this time, the protective cover 15 can be provided in a plate shape and can be fixed in the receiving area 118 by one or a combination of connection methods such as clamping, gluing, welding, etc., for example, glued or welded to the bottom of the receiving area 118 to cover the pressure relief hole 114 and the sound adjustment hole 117. Among them, the outer surface of the protective cover 15 can be flush with the outer surface of the core shell 11 or arc transition to improve the appearance quality of the earphone 100.

[0141] Further, the receiving area 118 can also be formed with a boss 1181, which is spaced apart from the side wall of the receiving area 118 to form a receiving groove 1182 around the boss 1181. Among them, the groove width of the receiving groove 1182 can be less than or equal to 0.3mm. At this time, the outlet ends of the pressure relief hole 114 and the sound adjustment hole 117 are located at the top of the boss 1181, that is, the receiving groove 1182 can surround the pressure relief hole 114 and the sound adjustment hole 117. Accordingly, the protective cover 15 can include a main cover plate 151 and a ring-shaped side plate 152, which is bent and connected to the edge of the main cover plate 151 to extend laterally to the main cover plate 151. Among them, the height of the ring-shaped side plate 152 relative to the main cover plate 151 can be between 0.5mm and 1.0mm. In this way, when the protective cover 15 is fixed in the receiving area 118, the ring-shaped side plate 152 can also be inserted and fixed in the receiving groove 1182 to improve the connection strength between the protective cover 15 and the core shell 11. For example, the ring-shaped side plate 152 is fixedly connected with the core shell 11 through the glue (not shown in the figure) in the receiving groove 1182. Further, the main cover plate 151 can also be connected with the top of the boss 1181 by welding. Among them, the top of the boss 1181 can be slightly lower than the outer surface of the core shell 11, for example, the difference between the two is about the thickness of the main cover plate 151.

[0142] Based on the above description, and in combination with Figure 2 and Figure 2, the outlet ends of the pressure relief holes 114 and the sound adjustment holes 117 can also be respectively covered by sound resistance meshes 1140 and 1170, so as to adjust the effective areas of the outlet ends of the pressure relief holes 114 and the sound adjustment holes 117, and further improve the acoustic performance of the earphone 100. At this time, the sound resistance meshes 1140 and 1170 can be first fixed on the top of the boss 1181 through the first annular adhesive sheet 1183, and then the protective cover 15 can be fixed in the accommodating area 118. Among them, the first annular adhesive sheet 1183 surrounds the pressure relief holes 114 and the sound adjustment holes 117 to expose the outlet ends of the two. Further, the main cover plate 151 can also be fixed on the sound resistance meshes 1140 and 1170 through the second annular adhesive sheet 1184. Among them, the ring width of the first annular adhesive sheet 1183 and the second annular adhesive sheet 1184 can be between 0.4mm and 0.5mm, and the thickness can be less than or equal to 0.1mm. Of course, in other embodiments, the sound resistance meshes 1140 and 1170 can be fixed on the protective cover 15 in advance to form a structural assembly, and then the structural assembly is fixed in the accommodating area 118. For example, the sound resistance meshes 1140 and 1170 are fixed on the same side of the main cover plate 151 through the second annular adhesive sheet 1184 and are surrounded by the annular side plate 152, thereby forming a structural assembly with the protective cover 15. Among them, the sound resistance meshes 1140 and 1170 can be at least partially staggered with each other, so as to cover the outlet ends of the adjacent pressure relief holes 114 and sound adjustment holes 117 respectively, and to adapt to the spacing distance between the two.

[0143] It should be noted that, in combination with Figure 19 , the end of the sound guide component 14 away from the core shell 11 can also be fixed with the sound resistance mesh 140 and the corresponding protective cover 15 in the same or similar way as any of the above ways, so as to cover the outlet end of the sound guide channel 141 with the sound resistance mesh 140 and cover it with the corresponding protective cover 15.

[0144] In combination with Figure 2 and Figure 4 , the coil support 121 can be exposed laterally from the front shell 116 in a direction perpendicular to the buckling direction of the front shell 116 and the rear shell 115. In other words, in combination with Figure 2 , for the front shell 116, the side adjacent to the sound outlet hole 113 or the sound guide component 14 of the front tubular side plate 1162 can be at least partially cut off to form a relief area for exposing the coil support 121. Further, the sound guide component 14 can be buckled to the exposed part of the coil support 121 and the outer side of the rear shell 115, and the sound guide channel 141 is in communication with the sound outlet hole 113. In this way, the side of the front shell 116 adjacent to the sound guide component 14 can not completely wrap the coil support 121, which can avoid the local overthickness of the core module 10 and does not hinder the fixation between the sound guide component 14 and the core shell 11.

[0145] As an example, the exposed portion of the coil support 121 and the outer side of the rear housing 115 can cooperate to form a boss 119. The boss 119 can include a first sub-boss portion 1191 located on the rear housing 115 and a second sub-boss portion 1192 located on the coil support 121. At this time, the sound outlet holes 113 can all be provided on the rear housing 115, and the outlet ends of the sound outlet holes 113 can be located on the top of the first sub-boss portion 1191. Accordingly, the sound guide component 14 can be provided with a recessed area 142 toward the side of the coil support 121 and the rear housing 115. At this time, the inlet end of the sound guide channel 141 can communicate with the bottom of the recessed area 142. In this way, when the sound guide component 14 is assembled with the core shell 11, the boss 119 can be embedded in the recessed area 142, and the sound guide channel 141 is in communication with the sound outlet holes 113. In combination Figure 19 , the height of the boss 119 and the depth of the recessed area 142 can satisfy the following relationship: when the top of the boss 119 and the bottom of the recessed area 142 abut, the end surface of the sound guide component 14 just contacts the core shell 11, or a gap is left between the two to improve the air tightness between the sound guide channel 141 and the sound outlet holes 113. Based on this, the top of the boss 119 and the bottom of the recessed area 142 can also be provided with an annular sealing member (not shown in the figure) and the like.

[0146] Further, one of the rear housing 115 and the sound guide component 14 can be provided with a plug hole 1154; accordingly, the other can be provided with a plug post 143. The plug post 143 can be inserted and fixed in the plug hole 1154 to improve the assembly precision and reliability of the sound guide component 14 and the core shell 11. As an example, the plug hole 1154 is provided on the rear housing 115, and specifically can be located on the first sub-boss portion 1191; the plug post 143 is provided on the sound guide component 14, and specifically can be located in the recessed area 142.

[0147] It should be noted that in combination Figure 19 , the sound guide component 14 and the core shell 11 can be assembled along the direction indicated by the dashed line in FIG. 11. Figure 19

[0148] In some embodiments, for example, the core module 10 is not provided with a diaphragm 13, and the front housing 116 can press and hold the coil support 121 on the annular abutment 1153 to improve the assembly reliability of the core module 10. Specifically, the front housing 116 can press and hold the other end of the second cylindrical support portion 1213 away from the annular main body portion 1211 on the annular abutment 1153.

[0149] ​In some other embodiments, the front shell 116 can press the coil support 121 and the diaphragm 13 connected thereto together on the annular support platform 1153 to improve the reliability of the assembly of the module 10, for example, when the module 10 is provided with the diaphragm 13. In this case, the diaphragm 13 can be connected to the other end of the second cylindrical support part 1213 away from the annular main body part 1211 through the reinforcing ring 136 thereof. Specifically, the front shell 116 can press the reinforcing ring 136 on the annular support platform 1153 through the second cylindrical support part 1213.

[0150] For example, in combination with Figure 4 and Figure 29 , the sound adjustment hole 117 can be provided in the form of a complete through hole in the rear shell 115, and the pressure relief hole 114 can be provided in the form of an incomplete gap in the front shell 116 and form a complete through hole by the splicing and cooperation of the rear shell 115 and the front shell 116. In this way, it is not only convenient to reduce the interval distance between the adjacent pressure relief hole 114 and the sound adjustment hole 117, but also convenient to make the actual area of the outlet end of the pressure relief hole 114 greater than the actual area of the outlet end of the sound adjustment hole 117.

[0151] Further, in combination with Figure 2 and Figure 1 , the connection between the annular main body part 1211 and the first cylindrical support part 1212 can be provided with a communication hole 1215, so that the air in the front cavity 111 does not need to bypass the coil support 121 and the coil 123 during the exhaust process, but directly passes through the coil support 121. In this way, not only can the exhaust efficiency of the front cavity 111 be increased, but also the wavelength of the standing wave in the front cavity 111 can be reduced, thereby making the peak resonance frequency of the air conduction sound output to the outside of the earphone 100 through the pressure relief hole 114 shift to high frequency. Of course, the communication hole 1215 can also be located entirely in the annular main body part 1211 or the first cylindrical support part 1212. Further, the number of communication holes 1215 can be multiple and arranged along the ring direction of the coil assembly. In this case, the cross-sectional area of each communication hole 1215 can be greater than or equal to 2mm 2 . For example, the cross-sectional area of the communication hole 1215 adjacent to the first pressure relief hole 1141 can be greater than or equal to 3mm 2 , and the cross-sectional area of the communication hole 1215 adjacent to the second pressure relief hole 1142 and the third pressure relief hole 1143, respectively, can be greater than or equal to 2.5mm 2 .

[0152] In combination with Figure 20 , the earphone 100 can include two modules 10, which can be located on the left and right sides of the user's head when the earphone 100 is in the wearing state. Based on this, in combination with Figure 21 and Figure 20 , the earphone 100 can include two modules 10, which can be located on the left and right sides of the user's head when the earphone 100 is in the wearing state. Based on this, in combination withThe embodiment can define that, when the earphone 100 is in the wearing state, the two machine core modules 10 located at the left side of the user's head are the left earphone machine core modules, for example Figure 21 The right earphone machine core modules are located at the right side of the user's head, for example Figure 20 Further, the machine core module 10 can be provided with other auxiliary devices such as function buttons and microphones in addition to the sound generating related structure such as the transducer 12, so as to enrich and expand the functions of the earphone 100. Based on the general use habit of the user, the function button can be placed in the left earphone machine core module, and the microphone can be placed in the right earphone machine core module. The volume of the function button and the microphone can be different. Of course, the auxiliary devices can also have other distribution settings, for example, one microphone is placed in each of the left and right earphone machine core modules, which are not listed one by one here.

[0153] As an example, in combination with Figure 21 The machine core module 10 can include a function button 16 arranged in the accommodation cavity of the machine core shell 11, and the function button 16 can be exposed from the rear shell 115 to facilitate receiving the pressing operation of the user. The triggering direction of the function button 16 can be generally consistent with the vibration direction of the transducer 12.

[0154] As an example, in combination with Figure 20 The machine core module 10 can include a first microphone 171 arranged in the accommodation cavity of the machine core shell 11, and the first microphone 171 can collect the sound outside the machine core module 10. The included angle between the vibration direction of the first microphone 171 and the vibration direction of the transducer 12 can be between 65 degrees and 115 degrees. In this way, mechanical resonance of the first microphone 171 with the vibration of the transducer 12 can be avoided, and the sound pickup effect of the machine core module 10 can be improved.

[0155] Further, the core module 10 can further include a second microphone 172 arranged in the accommodating cavity of the core housing 11, and the second microphone 172 can collect the sound outside the core module 10. Wherein, the included angle between the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 can be between 65 degrees to 115 degrees. In this way, the second microphone 172 and the first microphone 171 can respectively receive two different sounds, and also can receive the same sound from two different directions, thereby improving the noise reduction, voice call and other functions of the earphone 100. Based on this, the earphone 100 can further include a processing circuit (not shown in the figure) integrated on the main control circuit board 40, and the processing circuit can take the first microphone 171 as the main microphone, for example, for collecting the user's voice, and take the second microphone 172 as the auxiliary microphone, for example, for collecting the ambient sound of the environment where the user is located, and perform noise reduction processing on the sound signal collected by the first microphone 171 through the sound signal collected by the second microphone 172. Wherein, the first microphone 171 and the second microphone 172 can be welded on the same flexible circuit board, so as to simplify the wiring structure of the core module 10. Preferably, the vibration direction of the first microphone 171 and the vibration direction of the transducing device 12 are perpendicular to each other, and the vibration direction of the second microphone 172 and the vibration direction of the first microphone 171 are perpendicular to each other.

[0156] Based on the above description, the core module 10 can further include a diaphragm 13 connected between the transducing device 12 and the core housing 11, so that the core module 10 can produce air conduction sound while producing bone conduction sound. Based on this, in combination with Figure 21 (Or Figure 2 ) and Figure 20 , the core module 10 can further include a partition plate 18 arranged in the rear cavity 112, so as to separate the auxiliary device from the rear cavity 112, so that the space where the rear cavity 112 is located is as little as possible affected by the auxiliary device, so that the wall surface surrounding the rear cavity 112 can be as smooth and round as possible, thereby improving the acoustic performance of the air conduction sound of the earphone 100. At this time, the transducing device 12 is located on the side of the partition plate 18 facing the front cavity 111.

[0157] As an example, the partition plate 18 can divide the rear cavity 112 into a first sub-rear cavity 1121 arranged close to the front cavity 111 and a second sub-rear cavity 1122 arranged away from the front cavity 111. Among them, the sound outlet hole 113 and the sound adjusting hole 117 can be in communication with the first sub-rear cavity 1121 respectively, and the functional button 16, the second microphone 172 and other auxiliary devices can be arranged in the second sub-rear cavity 1122; and the first microphone 171 can be arranged in the first sub-rear cavity 1121. Based on this, the functional button 16 and the second microphone 171 can be fixed between the rear bottom plate 1151 of the left ear and the right ear core module and the corresponding partition plate 18 respectively. Correspondingly, the first microphone 171 can be fixed in the groove (not marked in the figure) of the rear cylindrical side plate 1152 of the right ear core module, so as to avoid the collision between the transducer 12 and the first microphone 171 in the process of working vibration, thereby increasing the reliability of the core module 10. Among them, for the left ear core module, the partition plate 18 can be used to bear the pressing force applied by the user to the functional button 16.

[0158] Further, the partition plate 18 can also be used to adjust the size of the first sub-rear cavity 1121, so that the volume of the first sub-rear cavity 1121 of the left ear core module is the same as that of the first sub-rear cavity 1121 of the right ear core module. In this way, the air conduction sound output by the left ear and right ear core modules tends to be consistent on the frequency response curve, thereby improving the acoustic performance of the earphone 100.

[0159] It should be noted that due to the uncontrollable factors such as machining precision and assembly precision, the volumes of the first sub-rear cavities of the left ear and right ear core modules are the same, which also means that a certain difference between the volumes of the two can be allowed, for example, less than or equal to 10%.

[0160] Further, the second sub-rear cavity 1122 can be filled with a colloid (not shown in the figure). Among them, the filling rate of the colloid in the second sub-rear cavity 1122 can be greater than or equal to 90%, so that the second sub-rear cavity 1122 is as solid as possible. In this way, the second sub-rear cavity 1122 is avoided to be a hollow structure and to occur acoustic resonance with the first sub-rear cavity 1121, thereby improving the acoustic performance of the earphone 100.

[0161] As an example, the partition plate 18 can be made of a light-transmitting material; correspondingly, the colloid to be filled can be a light-curing glue which can be cured under the action of light. Among them, the partition plate 18 can be pre-fixed with the rear shell 115 by means of a hot melt column. Further, the gap between the side surface of the partition plate 18 and the rear shell 115 can also be filled with the light-curing glue. Similarly, the groove of the rear cylindrical side plate 1152 can also be filled with the light-curing glue or other colloid after accommodating the second microphone 172.

[0162] Further, in combination with Figure 21 (orFigure 2 ) and Figure 22 In the vibration direction of the transducing device 12, the outer end surface of the magnetic conductive cover 1221 is spaced apart from the baffle plate 18 to avoid collision between the two when the transducing device 12 is working. Moreover, the spacing distance between the central region of the outer end surface of the magnetic conductive cover 1221 and the baffle plate 18 can be greater than the spacing distance between the edge region of the outer end surface of the magnetic conductive cover 1221 and the baffle plate 18, that is, the middle region of the first sub-rear cavity 1121 is more spacious than the edge region, thereby facilitating the flow of air in the first sub-rear cavity 1121. For the magnetic conductive cover 1221, the central region of the one surface of the bottom plate 1223 facing the baffle plate 18 can be concave in the direction away from the baffle plate 18 to form a curved surface; and / or for the baffle plate 18, the central region of the one surface of the baffle plate 18 facing the magnetic conductive cover 1221 can be concave in the direction away from the magnetic conductive cover 1221 to form a curved surface.

[0163] In combination with Figure 1 and Figure 23 The ear-hanging assembly 20 can include a containing bin 21, a bending transition part 22, and a core fixing part 23. The containing bin 21 can be used to contain the main control circuit board 40 or the battery 50, the core fixing part 23 is used to fix the core module 10, and the bending transition part 22 connects the containing bin 21 and the core fixing part 23. Further, the bending transition part 22 can be provided in a bent shape to facilitate the ear-hanging assembly 20 to be hung between the ear and the head of the user.

[0164] As an example, the containing bin 21 and the core fixing part 23 can be plastic parts, and the bending transition part 22 can be internally provided with an elastic metal wire. The elastic metal wire and the plastic can be integrally connected by a metal insert molding process. The surface of the ear-hanging assembly 20 can be an elastic covering body to improve the wearing comfort of the earphone 100.

[0165] As an example, the containing bin 21 can include a main bin body 211 and a cover plate 212. In combination with Figure 24 , the main bin body 211 is used to form an open containing space (not labeled in the figure), and the cover plate 212 can be covered on the open end of the main bin body 211. Further, in combination with Figure 23The opening end of the main cartridge body 211 can be provided with an outer end face 2111, an inner side face 2112, and a transition face 2113 connecting the outer end face 2111 and the inner side face 2112. When the cover plate 212 is arranged at the opening end of the main cartridge body 211, the cover plate 212 is spaced apart from at least part of the transition face 2113 to form a glue accommodating space 213 between the cover plate 212 and the transition face 2113 for accommodating glue. At this time, the cover plate 212 and the main cartridge body 211 can be connected by the glue (not shown in the figure) in the glue accommodating space 213. In this way, compared with the related art which provides an annular glue dispensing table between the outer end face 2111 and the inner side face 2112 and which is generally perpendicular to the inner side face 2112, the embodiment can meet the glue dispensing requirement while ensuring the structural strength of the opening end of the main cartridge body 211 to the greatest extent, thereby facilitating the thinning of the overall structure of the main cartridge body 211. The wall thickness of the opening end of the main cartridge body 211 can be between 0.6 mm and 1.0 mm. Of course, in other embodiments, the cover plate 212 and the outer end face 2111 can also be connected by welding when the cover plate 212 is arranged at the opening end of the main cartridge body 211. At this time, the opening end of the main cartridge body 211 can not be provided with the transition face 2113.

[0166] Further, the transition face 2113 can be a plane and can be connected to the outer end face 2111 and the inner side face 2112 at an obtuse angle, respectively. The obtuse angle (for example, θ1) between the transition face 2113 and the outer end face 2111 can be smaller than the obtuse angle (for example, θ2) between the transition face 2113 and the inner side face 2112. In this way, the volume of the glue accommodating space 213 can meet the glue dispensing requirement while the local wall thickness of the opening end of the main cartridge body 211 is ensured to the greatest extent, thereby increasing the structural strength of the opening end of the main cartridge body 211. As an example, the obtuse angle between the transition face 2113 and the outer end face 2111 can be between 110 degrees and 135 degrees, or the obtuse angle between the transition face 2113 and the inner side face 2112 can be between 135 degrees and 160 degrees.

[0167] It should be noted that the transition face 2113 can also be provided with a knurling structure to increase the contact area with the glue, thereby improving the glue joint strength between the cover plate 212 and the main cartridge body 211.

[0168] As an example, in combination with Figure 24 and Figure 23The cover plate 212 can include a main cover body 2121 and an annular flange 2122 connected to the main cover body 2121. The main cover body 2121 can be arranged on the outer end surface 2111 and in contact with the outer end surface 2111 to limit the position. The annular flange 2122 extends into the main cartridge body 211. At this time, the glue accommodating space 213 can be formed between the transition surface 2113 and the lower surface of the main cover body 2121 and the outer side surface of the annular flange 2122. Based on this, the main cartridge body 211 and the cover plate 212 can be assembled in an inverted manner, for example, a suitable amount of glue is first applied between the lower surface of the main cover body 2121 and the outer side surface of the annular flange 2122 by a glue dispenser, and then the ear-hanging assembly 20 is inverted and arranged on the cover plate 212 through the main cartridge body 211, so as to avoid the glue flowing and overflowing towards the inside of the main cartridge body 211.

[0169] As an example, in combination with Figure 22 The main control circuit board 40 can be arranged in the accommodating cartridge 21, and the switch assembly 41 can be arranged on the main control circuit board 40. The switch assembly 41 can include a first fixed part 411, a second fixed part 412, and a switch body 413. The second fixed part 412 can be connected to the first fixed part 411 by bending, and the switch body 413 can be arranged on the second fixed part 412. At this time, the first fixed part 411 can be arranged in contact with the main surface of the main control circuit board 40, and the two can be welded together. The second fixed part 412 can be arranged in contact with the side surface of the main control circuit board 40, and the switch body 413 is located on the side of the second fixed part 412 away from the main control circuit board 40.

[0170] Further, the main cover body 2121 can be provided with a key hole 2123, and the key hole 2123 can be surrounded by the annular flange 2122. Correspondingly, the ear-hanging assembly 20 can further include a key assembly 24 fixed on the side of the main cover body 2121 away from the annular flange 2122. The key assembly 24 is arranged to be capable of receiving the pressing force applied by the user and triggering the switch assembly 41 through the key hole 2123. At this time, the pressing direction of the key assembly 24 to the switch assembly 41 can be parallel to the main surface of the main control circuit board 40, so as to avoid the deformation of the main control circuit board 40 in the direction perpendicular to the main surface thereof.

[0171] As an example, in combination with Figure 23 and Figure 23The side of the main cover body 2121 away from the annular flange 2122 can also be partially recessed towards the annular flange 2122 to form a placement area 2124, and the key hole 2123 can be arranged in the placement area 2124. Correspondingly, the key assembly 24 can include a soft key 241 and a hard key 242 connected with the soft key 241. The soft key 241 is arranged in the placement area 2124 and covers the key hole 2123. At this time, the user presses the hard key 242 to make the soft key 241 deform and produce a stroke to the inside of the accommodation cavity 21 under the avoidance of the key hole 2123, and then act on the switch body 413 to trigger the switch assembly 41.

[0172] Further, the soft key 241 can include an integral intermediate protruding part 2411 and an edge connecting part 2412, the edge connecting part 2412 is used to connect with the main cover body 2121, and the intermediate protruding part 2411 is used to connect with the hard key 242. The depth of the placement area 2124 is greater than the thickness of the edge connecting part 2412 and less than the thickness of the intermediate protruding part 2411. At this time, the soft key 241 and the cover plate 212 can be integrally connected by using a two-color injection molding process. Since the depth of the placement area 2124 is greater than the thickness of the edge connecting part 2412, overflow of glue during molding can be avoided. Of course, in other embodiments, the side of the main cover body 2121 away from the annular flange 2122 can also be provided with an annular bone site surrounding the placement area 2124. The height of the annular bone site protruding from the main cover body 2121 can be about 0.05 mm, and the ring width can be about 0.2 mm, so that it can be used as a glue blocking wall during molding, and overflow of glue can also be avoided.

[0173] As an example, in combination with Figure 25 The number of the switch assembly 41, the key hole 2123 and the soft key 241 can be two respectively and arranged one by one. The intermediate protruding part 2411 of each soft key 241 can be provided with a blind hole (not labeled in the figure). Correspondingly, the hard key 242 can include an integral pressing part 2421 and a plug column 2422. The number of the plug column 2422 can also be two, and each plug column 2422 is embedded in a blind hole, and the two can be interference fit. Based on this, the two switch assemblies 41 can correspond to the volume up button and the volume down button of the earphone 100 respectively, and any one of them can also be extended as a power button of the earphone 100.

[0174] In combination with Figure 26 and Figure 26The rear-hanging component 30 can include an elastic metal wire 31 and a metal connector 32, and the metal connector 32 can be sleeved and fixed at both ends of the elastic metal wire 31 respectively. At this time, the two ends of the rear-hanging component 30 can be connected to one end of the ear-hanging component 20 (for example, the accommodating cavity 21 thereof) through the respective metal connectors 32. The first part 311 of the elastic metal wire 31 inside the metal connector 32 can have a deformation amount less than or equal to 10% compared with the second part 312 of the elastic metal wire 31 outside the metal connector 32. In this way, compared with the prior art in which the two ends of the elastic metal wire are first flattened and then plastic connectors are formed at the two ends of the elastic metal wire by injection molding, the metal connector 32 is used instead of the plastic connector in the present embodiment, so that the two ends of the elastic metal wire 31 do not need to be deformed (or less deformed), thereby avoiding the embrittlement of the two ends of the elastic metal wire 31 due to deformation, and increasing the reliability of the rear-hanging component 30. In addition, compared with the plastic connector, the metal connector 32 itself has better structural strength.

[0175] It should be noted that the deformation amount described in the present embodiment can be calculated by the following method: |φ1-φ2| / φ2. Wherein, φ1 is the cross-sectional dimension along any direction passing through the geometric center of the cross section of the first part 311, and φ2 is the cross-sectional dimension along the same direction as φ1 and passing through the geometric center of the cross section of the second part 312. For example, the elastic metal wire 31 is a wire, and has not been deformed, then φ1 and φ2 correspond to the wire diameters of the first part 311 and the second part 312 respectively.

[0176] As an example, for the elastic metal wire 31, the second part 312 can be arranged in a curved shape compared with the first part 311, so as to wrap around the back of the user's head. Further, the material of the elastic metal wire 31 can be spring steel, titanium alloy, titanium-nickel alloy, chromium-molybdenum steel, etc., and the material of the metal connector 32 can be titanium alloy (for example, nickel-titanium alloy, titanium alloy, beta titanium, etc.), steel alloy (for example, stainless steel, carbon steel, iron, etc.), copper alloy (for example, red copper, brass, bronze and white copper), aluminum alloy, etc.

[0177] In some embodiments, the metal connector 32 can be provided with a mounting hole (not labeled in the figure). At this time, the elastic metal wire 31 can be inserted into the mounting hole and connected with the metal connector 32 by welding. Wherein, in combination with Figure 26 The end of the elastic metal wire 31 can further be exposed from the outer end surface of the metal connector 32, and the welding point between the elastic metal wire 31 and the metal connector 32 can be formed between the exposed part of the elastic metal wire 31 and the outer end surface of the metal connector 32. In short, the metal connector 32 is sleeved on the elastic metal wire 31 and can expose the end of the elastic metal wire 31, and then the ends of the two are welded.

[0178] In other embodiments, the metal connector 32 is connected to the elastic metal wire 31 by means of die casting. Compared with the above-mentioned welding connection, the die casting connection makes the metal connector 32 directly wrap on the elastic metal wire 31, similar to plastic injection molding.

[0179] Further, regardless of the welding connection or the die casting connection, in order to increase the bonding strength between the elastic metal wire 31 and the metal connector 32, the outer surface of the first portion 311 can be provided with a knurling structure (not shown in the figure) to increase the contact area between the elastic metal wire 31 and the metal connector 32. Among them, the ratio between the depth of the knurling structure and the cross-sectional dimension of the first portion 311 can be less than or equal to 15%. Preferably, the ratio between the depth of the knurling structure and the cross-sectional dimension of the first portion 311 can be less than or equal to 5%. For example, the depth of the knurling structure is between 0.2mm and 0.3mm.

[0180] As an example, in combination with Figure 27 and Figure 28 The metal connector 32 can be provided in a columnar shape and can have a mounting surface 321 parallel to the axial direction of the metal connector 32. Among them, the mounting surface 321 can be provided in a planar shape and extends through both ends of the metal connector 32 along the axial direction. In this way, since the wire 33 mentioned hereinafter is generally a wire rod, its cross section is generally circular, so that the metal connector 32 can be assembled with the wire 33 through the planar mounting surface 321, facilitating the arrangement of the wire of the rear hanging assembly 30.

[0181] Further, the metal connector 32 can also have an anti-rotation surface 322 parallel to the mounting surface 321. In this way, after the rear hanging assembly 30 is connected to the ear hanging assembly 20 (for example, the accommodating cavity 21 thereof) through the metal connector 32, the two are not easy to rotate relative to each other. Among them, the anti-rotation surface 322 only extends through one end of the metal connector 32 close to the elastic metal wire 31 along the axial direction, so that one end of the metal connector 32 can form a stop flange 323 connected with the anti-rotation surface 322. In this way, during the process of connecting the rear hanging assembly 30 to the ear hanging assembly 20 (for example, the accommodating cavity 21 thereof) through the metal connector 32, the metal connector 32 can be limited by the stop flange 323 abutting against the end surface of the ear hanging assembly 20.

[0182] Further, the other end of the metal connector 32 away from the stop flange 323 can be provided with a stop slot 324. The stop slot 324 can extend through the attaching surface 321 and the anti-rotation surface 322 in a radial direction of the metal connector 32, and two stop slots 324 can be oppositely arranged in another radial direction of the metal connector 32. In this way, the metal connector 32 and the ear hook assembly 20 (e.g., the accommodating cavity 21) can be formed in a clamping fit, thereby avoiding the separation of the rear hanging assembly 30 and the ear hook assembly 20 after the assembly.

[0183] As an example, in combination with Figure 25 and Figure 25 , the rear hanging assembly 30 can further include a wire 33 and an elastic covering body 34. The length of the wire 33 is greater than the length of the elastic wire 31, and the wire 33 extends from one end of the elastic wire 31 to the other end of the elastic wire 31. Further, the elastic covering body 34 can be made of a soft material (e.g., silicone), and can cover the wire 33, the elastic wire 31, and the metal connectors 32 at both ends of the elastic wire 31, so as to improve the wearing comfort of the earphone 100.

[0184] In some embodiments, the elastic covering body 34 can be provided with a threading channel (not labeled in the figure), and the elastic wire 31 and the wire 33 are threaded in the threading channel. In order to facilitate threading, the size of the threading channel is set to allow the elastic wire 31 and the wire 33 to move in the threading channel, for example, the cross-sectional area of the threading channel is greater than the sum of the cross-sectional areas of the elastic wire 31 and the wire 33.

[0185] In other embodiments, the elastic covering body 34 can cover the wire 33 by injection molding and be provided with a threading channel, and the elastic wire 31 is threaded in the threading channel. Similarly, in order to facilitate threading, the size of the threading channel is set to allow the elastic wire 31 to move in the threading channel, for example, the cross-sectional area of the threading channel is greater than the cross-sectional area of the elastic wire 31.

[0186] As an example, in combination with Figure 1 and Figure 25 , the elastic covering body 34 can include a rear hanging covering part 341 and a cavity covering part 342 integrally connected. The rear hanging covering part 341 is used to cover the elastic wire 31 and the wire 33, and the cavity covering part 342 is used to at least partially cover the accommodating cavity 21 after the metal connector 32 is connected with the accommodating cavity 21.

[0187] Further, the housing covering portion 342 can at least partially cover the accommodating cavity 21, and can include a first covering portion 3421 close to the metal connector 32 and a second covering portion 3422 away from the metal connector 32. The first covering portion 3421 and the second covering portion 3422 can be fixedly bonded to the accommodating cavity 21, respectively, and the bonding strength of the second covering portion 3422 to the accommodating cavity 21 is greater than the bonding strength of the first covering portion 3421 to the accommodating cavity 21. In this way, by virtue of the difference in bonding strength, the relative positions of the housing covering portion 342 and the accommodating cavity 21 can be adjusted during the gluing process to eliminate assembly errors therebetween, thereby improving the appearance quality of the earphone 100. Based on this, the first covering portion 3421 can be fixedly connected to the accommodating cavity 21 by a first glue (not shown in the figure), and the second covering portion 3422 can be fixedly connected to the accommodating cavity 21 by a second glue (not shown in the figure), and the curing speed of the second glue is greater than the curing speed of the first glue. For example, the first glue can be silicone glue or other soft glue, and the second glue can be instant glue, structural glue, PUR glue, etc. The second glue can be mainly point-coated on the end of the second covering portion 3422 away from the first covering portion 3421 to play a pre-fixing role.

[0188] Based on the above description, the accommodating cavity 21 can be a plastic part, and the elastic covering body 34 can be a silicone part. Due to the large difference in material between the two, the two are prone to delamination after direct gluing. Therefore, in combination with the above Figure 25 , the second covering portion 3422 can be internally injection-molded with a transition connecting piece 3423, and the bonding strength of the transition connecting piece 3423 to the accommodating cavity 21 is greater than the bonding strength of the second covering portion 3422 to the accommodating cavity 21, so as to replace the gluing of the second covering portion 3422 to the accommodating cavity 21. The transition connecting piece 3423 can be a metal part or a plastic part, and when the transition connecting piece 3423 is a plastic part, its material can be the same as that of the accommodating cavity 21.

[0189] As an example, in combination with the above Figure 22 and Figure 25 , for the housing covering portion 342, the first covering portion 3421 can be provided in a sleeve shape, and the second covering portion 3422 is provided in a strip shape. In this way, after the metal connector 32 is connected to the accommodating cavity 21, when the housing covering portion 342 covers the accommodating cavity 21, the first covering portion 3421 can be sleeved on the periphery of the main housing body 211 and the cover plate 212, and the second covering portion 3422 covers the cover plate 212 and can further cover the fitting gap between the cover plate 212 and the main housing body 211, so as to increase the waterproof performance of the earphone 100.

[0190] Further, in combination with the above Figure 23 and ​The second covering part 3422 can be provided with an avoiding hole 3424 corresponding to the key hole 2123, so that the middle protruding part 2411 of each soft key 241 can be exposed through the avoiding hole 3424, and then connected with the hard key 242. The edge connecting part 2412 of each soft key 241 is located between the main cover body 212 and the second covering part 3422, and the pressing part 2421 is located on the side of the second covering part 3422 away from the main cover body 212. In this way, the waterproof performance of the earphone 100 is improved.

[0191] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application. Any equivalent device or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. An earphone, characterized in that, The earphone includes a core module, an ear hook assembly, and a back hook assembly. The ear hook assembly connects to one end of the core module and one end of the back hook assembly, respectively. The ear hook assembly includes a main control circuit board and a housing for accommodating a battery or the main control circuit board. The back hook assembly includes an elastic metal wire, a metal connector, and an elastic covering. The metal connector is respectively sleeved and fixed to both ends of the elastic metal wire and further connected to the housing. The elastic covering covers the elastic metal wire and further forms a housing covering portion. The housing covering portion at least partially covers the housing and includes a first covering portion near the metal connector and a second covering portion away from the metal connector. The first covering portion and the second covering portion are respectively bonded and fixed to the housing. The bonding strength between the second covering portion and the housing is greater than the bonding strength between the first covering portion and the housing. The main control circuit board is electrically connected to the core module.

2. The earphone according to claim 1, characterized in that, The second covering part has a transition connector injection molded inside, and the bonding strength between the transition connector and the accommodating chamber is greater than the bonding strength between the second covering part and the accommodating chamber.

3. The earphone according to claim 2, characterized in that, The accommodating compartment is made of plastic, and the transition connector is made of metal or plastic.

4. The earphone according to claim 1, characterized in that, The first coating part is fixedly connected to the container via a first colloid, and the second coating part is fixedly connected to the container via a second colloid. The curing speed of the second colloid is greater than that of the first colloid.

5. The earphone according to claim 1, characterized in that, The accommodating compartment includes a main compartment body and a cover plate. The main compartment body is used to form an accommodating space with one end open. The cover plate is placed on the open end of the main compartment body. The first covering part is sleeve-shaped and is placed around the main compartment body and the cover plate. The second covering part is strip-shaped and covers the cover plate.

6. The earphone according to claim 5, characterized in that, The main compartment has an outer end face, an inner side face, and a transition surface that is inclined to connect the outer end face and the inner side face. The cover plate and at least a portion of the transition surface are spaced apart to form a colloid-containing space between the cover plate and the transition surface for containing the colloid.

7. The earphone according to claim 6, characterized in that, The cover plate includes a main cover body and an annular flange connected to the main cover body. The main cover body covers the outer end face and contacts the outer end face. The annular flange extends into the main compartment body. The adhesive space is formed between the transition surface and the lower surface of the main cover body and the outer surface of the annular flange.

8. The earphone according to claim 7, characterized in that, The transition surface is a plane and is connected to the outer end face and the inner side face at obtuse angles, respectively. The obtuse angle between the transition surface and the outer end face is smaller than the obtuse angle between the transition surface and the inner side face.

9. The earphone according to claim 7, characterized in that, The main control circuit board is provided with a switch assembly, which includes a first fixing part, a second fixing part and a switch body. The first fixing part is attached to the main surface of the main control circuit board, the second fixing part is bent and connected to the first fixing part and is attached to the side surface of the main control circuit board, and the switch body is located on the side of the second fixing part away from the main control circuit board.

10. The earphone according to claim 9, characterized in that, The main cover is provided with a button hole, and the ear hook assembly also includes a button assembly fixed on the side of the main cover away from the annular flange. The button assembly is configured to receive the pressing pressure applied by the user and trigger the switch assembly through the button hole. The pressing direction of the button assembly on the switch assembly is parallel to the main surface of the main control circuit board.

11. The earphone according to claim 10, characterized in that, The button assembly includes a soft button and a hard button. A portion of the main cover facing away from the annular flange is recessed towards the annular flange to form a placement area. The button hole is disposed within the placement area. The soft button is disposed within the placement area and covers the button hole. The soft button includes an integrally connected central protrusion and an edge connecting portion. The edge connecting portion is connected to the main cover. The hard button is connected to the central protrusion. The depth of the placement area is greater than the thickness of the edge connecting portion and less than the thickness of the central protrusion.

12. The earphone according to claim 11, characterized in that, The number of the switch assembly, the button hole, and the soft button are two each, and they are arranged in a one-to-one correspondence. The middle protrusion of each soft button is provided with a blind hole. The edge connection part of each soft button is located between the main cover and the second covering part. The second covering part is provided with avoidance holes corresponding to the button holes. The middle protrusion of each soft button is exposed through the avoidance hole. The hard button includes an integrally connected pressing part and a pin. The pressing part is located on the side of the second covering part away from the main cover. The number of pins is also two, and each pin is embedded in one of the blind holes.

Images